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 43 struct wm8940_priv { 44 unsigned int sysclk; 45 enum snd_soc_control_type control_type; 46 void *control_data; 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 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)); 300 301 error_ret: 302 return ret; 303 } 304 305 #define wm8940_reset(c) snd_soc_write(c, WM8940_SOFTRESET, 0); 306 307 static int wm8940_set_dai_fmt(struct snd_soc_dai *codec_dai, 308 unsigned int fmt) 309 { 310 struct snd_soc_codec *codec = codec_dai->codec; 311 u16 iface = snd_soc_read(codec, WM8940_IFACE) & 0xFE67; 312 u16 clk = snd_soc_read(codec, WM8940_CLOCK) & 0x1fe; 313 314 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 315 case SND_SOC_DAIFMT_CBM_CFM: 316 clk |= 1; 317 break; 318 case SND_SOC_DAIFMT_CBS_CFS: 319 break; 320 default: 321 return -EINVAL; 322 } 323 snd_soc_write(codec, WM8940_CLOCK, clk); 324 325 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 326 case SND_SOC_DAIFMT_I2S: 327 iface |= (2 << 3); 328 break; 329 case SND_SOC_DAIFMT_LEFT_J: 330 iface |= (1 << 3); 331 break; 332 case SND_SOC_DAIFMT_RIGHT_J: 333 break; 334 case SND_SOC_DAIFMT_DSP_A: 335 iface |= (3 << 3); 336 break; 337 case SND_SOC_DAIFMT_DSP_B: 338 iface |= (3 << 3) | (1 << 7); 339 break; 340 } 341 342 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 343 case SND_SOC_DAIFMT_NB_NF: 344 break; 345 case SND_SOC_DAIFMT_NB_IF: 346 iface |= (1 << 7); 347 break; 348 case SND_SOC_DAIFMT_IB_NF: 349 iface |= (1 << 8); 350 break; 351 case SND_SOC_DAIFMT_IB_IF: 352 iface |= (1 << 8) | (1 << 7); 353 break; 354 } 355 356 snd_soc_write(codec, WM8940_IFACE, iface); 357 358 return 0; 359 } 360 361 static int wm8940_i2s_hw_params(struct snd_pcm_substream *substream, 362 struct snd_pcm_hw_params *params, 363 struct snd_soc_dai *dai) 364 { 365 struct snd_soc_pcm_runtime *rtd = substream->private_data; 366 struct snd_soc_codec *codec = rtd->codec; 367 u16 iface = snd_soc_read(codec, WM8940_IFACE) & 0xFD9F; 368 u16 addcntrl = snd_soc_read(codec, WM8940_ADDCNTRL) & 0xFFF1; 369 u16 companding = snd_soc_read(codec, 370 WM8940_COMPANDINGCTL) & 0xFFDF; 371 int ret; 372 373 /* LoutR control */ 374 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE 375 && params_channels(params) == 2) 376 iface |= (1 << 9); 377 378 switch (params_rate(params)) { 379 case 8000: 380 addcntrl |= (0x5 << 1); 381 break; 382 case 11025: 383 addcntrl |= (0x4 << 1); 384 break; 385 case 16000: 386 addcntrl |= (0x3 << 1); 387 break; 388 case 22050: 389 addcntrl |= (0x2 << 1); 390 break; 391 case 32000: 392 addcntrl |= (0x1 << 1); 393 break; 394 case 44100: 395 case 48000: 396 break; 397 } 398 ret = snd_soc_write(codec, WM8940_ADDCNTRL, addcntrl); 399 if (ret) 400 goto error_ret; 401 402 switch (params_format(params)) { 403 case SNDRV_PCM_FORMAT_S8: 404 companding = companding | (1 << 5); 405 break; 406 case SNDRV_PCM_FORMAT_S16_LE: 407 break; 408 case SNDRV_PCM_FORMAT_S20_3LE: 409 iface |= (1 << 5); 410 break; 411 case SNDRV_PCM_FORMAT_S24_LE: 412 iface |= (2 << 5); 413 break; 414 case SNDRV_PCM_FORMAT_S32_LE: 415 iface |= (3 << 5); 416 break; 417 } 418 ret = snd_soc_write(codec, WM8940_COMPANDINGCTL, companding); 419 if (ret) 420 goto error_ret; 421 ret = snd_soc_write(codec, WM8940_IFACE, iface); 422 423 error_ret: 424 return ret; 425 } 426 427 static int wm8940_mute(struct snd_soc_dai *dai, int mute) 428 { 429 struct snd_soc_codec *codec = dai->codec; 430 u16 mute_reg = snd_soc_read(codec, WM8940_DAC) & 0xffbf; 431 432 if (mute) 433 mute_reg |= 0x40; 434 435 return snd_soc_write(codec, WM8940_DAC, mute_reg); 436 } 437 438 static int wm8940_set_bias_level(struct snd_soc_codec *codec, 439 enum snd_soc_bias_level level) 440 { 441 u16 val; 442 u16 pwr_reg = snd_soc_read(codec, WM8940_POWER1) & 0x1F0; 443 int ret = 0; 444 445 switch (level) { 446 case SND_SOC_BIAS_ON: 447 /* ensure bufioen and biasen */ 448 pwr_reg |= (1 << 2) | (1 << 3); 449 /* Enable thermal shutdown */ 450 val = snd_soc_read(codec, WM8940_OUTPUTCTL); 451 ret = snd_soc_write(codec, WM8940_OUTPUTCTL, val | 0x2); 452 if (ret) 453 break; 454 /* set vmid to 75k */ 455 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x1); 456 break; 457 case SND_SOC_BIAS_PREPARE: 458 /* ensure bufioen and biasen */ 459 pwr_reg |= (1 << 2) | (1 << 3); 460 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x1); 461 break; 462 case SND_SOC_BIAS_STANDBY: 463 /* ensure bufioen and biasen */ 464 pwr_reg |= (1 << 2) | (1 << 3); 465 /* set vmid to 300k for standby */ 466 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x2); 467 break; 468 case SND_SOC_BIAS_OFF: 469 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg); 470 break; 471 } 472 473 return ret; 474 } 475 476 struct pll_ { 477 unsigned int pre_scale:2; 478 unsigned int n:4; 479 unsigned int k; 480 }; 481 482 static struct pll_ pll_div; 483 484 /* The size in bits of the pll divide multiplied by 10 485 * to allow rounding later */ 486 #define FIXED_PLL_SIZE ((1 << 24) * 10) 487 static void pll_factors(unsigned int target, unsigned int source) 488 { 489 unsigned long long Kpart; 490 unsigned int K, Ndiv, Nmod; 491 /* The left shift ist to avoid accuracy loss when right shifting */ 492 Ndiv = target / source; 493 494 if (Ndiv > 12) { 495 source <<= 1; 496 /* Multiply by 2 */ 497 pll_div.pre_scale = 0; 498 Ndiv = target / source; 499 } else if (Ndiv < 3) { 500 source >>= 2; 501 /* Divide by 4 */ 502 pll_div.pre_scale = 3; 503 Ndiv = target / source; 504 } else if (Ndiv < 6) { 505 source >>= 1; 506 /* divide by 2 */ 507 pll_div.pre_scale = 2; 508 Ndiv = target / source; 509 } else 510 pll_div.pre_scale = 1; 511 512 if ((Ndiv < 6) || (Ndiv > 12)) 513 printk(KERN_WARNING 514 "WM8940 N value %d outwith recommended range!d\n", 515 Ndiv); 516 517 pll_div.n = Ndiv; 518 Nmod = target % source; 519 Kpart = FIXED_PLL_SIZE * (long long)Nmod; 520 521 do_div(Kpart, source); 522 523 K = Kpart & 0xFFFFFFFF; 524 525 /* Check if we need to round */ 526 if ((K % 10) >= 5) 527 K += 5; 528 529 /* Move down to proper range now rounding is done */ 530 K /= 10; 531 532 pll_div.k = K; 533 } 534 535 /* Untested at the moment */ 536 static int wm8940_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id, 537 int source, unsigned int freq_in, unsigned int freq_out) 538 { 539 struct snd_soc_codec *codec = codec_dai->codec; 540 u16 reg; 541 542 /* Turn off PLL */ 543 reg = snd_soc_read(codec, WM8940_POWER1); 544 snd_soc_write(codec, WM8940_POWER1, reg & 0x1df); 545 546 if (freq_in == 0 || freq_out == 0) { 547 /* Clock CODEC directly from MCLK */ 548 reg = snd_soc_read(codec, WM8940_CLOCK); 549 snd_soc_write(codec, WM8940_CLOCK, reg & 0x0ff); 550 /* Pll power down */ 551 snd_soc_write(codec, WM8940_PLLN, (1 << 7)); 552 return 0; 553 } 554 555 /* Pll is followed by a frequency divide by 4 */ 556 pll_factors(freq_out*4, freq_in); 557 if (pll_div.k) 558 snd_soc_write(codec, WM8940_PLLN, 559 (pll_div.pre_scale << 4) | pll_div.n | (1 << 6)); 560 else /* No factional component */ 561 snd_soc_write(codec, WM8940_PLLN, 562 (pll_div.pre_scale << 4) | pll_div.n); 563 snd_soc_write(codec, WM8940_PLLK1, pll_div.k >> 18); 564 snd_soc_write(codec, WM8940_PLLK2, (pll_div.k >> 9) & 0x1ff); 565 snd_soc_write(codec, WM8940_PLLK3, pll_div.k & 0x1ff); 566 /* Enable the PLL */ 567 reg = snd_soc_read(codec, WM8940_POWER1); 568 snd_soc_write(codec, WM8940_POWER1, reg | 0x020); 569 570 /* Run CODEC from PLL instead of MCLK */ 571 reg = snd_soc_read(codec, WM8940_CLOCK); 572 snd_soc_write(codec, WM8940_CLOCK, reg | 0x100); 573 574 return 0; 575 } 576 577 static int wm8940_set_dai_sysclk(struct snd_soc_dai *codec_dai, 578 int clk_id, unsigned int freq, int dir) 579 { 580 struct snd_soc_codec *codec = codec_dai->codec; 581 struct wm8940_priv *wm8940 = snd_soc_codec_get_drvdata(codec); 582 583 switch (freq) { 584 case 11289600: 585 case 12000000: 586 case 12288000: 587 case 16934400: 588 case 18432000: 589 wm8940->sysclk = freq; 590 return 0; 591 } 592 return -EINVAL; 593 } 594 595 static int wm8940_set_dai_clkdiv(struct snd_soc_dai *codec_dai, 596 int div_id, int div) 597 { 598 struct snd_soc_codec *codec = codec_dai->codec; 599 u16 reg; 600 int ret = 0; 601 602 switch (div_id) { 603 case WM8940_BCLKDIV: 604 reg = snd_soc_read(codec, WM8940_CLOCK) & 0xFFEF3; 605 ret = snd_soc_write(codec, WM8940_CLOCK, reg | (div << 2)); 606 break; 607 case WM8940_MCLKDIV: 608 reg = snd_soc_read(codec, WM8940_CLOCK) & 0xFF1F; 609 ret = snd_soc_write(codec, WM8940_CLOCK, reg | (div << 5)); 610 break; 611 case WM8940_OPCLKDIV: 612 reg = snd_soc_read(codec, WM8940_ADDCNTRL) & 0xFFCF; 613 ret = snd_soc_write(codec, WM8940_ADDCNTRL, reg | (div << 4)); 614 break; 615 } 616 return ret; 617 } 618 619 #define WM8940_RATES SNDRV_PCM_RATE_8000_48000 620 621 #define WM8940_FORMATS (SNDRV_PCM_FMTBIT_S8 | \ 622 SNDRV_PCM_FMTBIT_S16_LE | \ 623 SNDRV_PCM_FMTBIT_S20_3LE | \ 624 SNDRV_PCM_FMTBIT_S24_LE | \ 625 SNDRV_PCM_FMTBIT_S32_LE) 626 627 static struct snd_soc_dai_ops wm8940_dai_ops = { 628 .hw_params = wm8940_i2s_hw_params, 629 .set_sysclk = wm8940_set_dai_sysclk, 630 .digital_mute = wm8940_mute, 631 .set_fmt = wm8940_set_dai_fmt, 632 .set_clkdiv = wm8940_set_dai_clkdiv, 633 .set_pll = wm8940_set_dai_pll, 634 }; 635 636 static struct snd_soc_dai_driver wm8940_dai = { 637 .name = "wm8940-hifi", 638 .playback = { 639 .stream_name = "Playback", 640 .channels_min = 1, 641 .channels_max = 2, 642 .rates = WM8940_RATES, 643 .formats = WM8940_FORMATS, 644 }, 645 .capture = { 646 .stream_name = "Capture", 647 .channels_min = 1, 648 .channels_max = 2, 649 .rates = WM8940_RATES, 650 .formats = WM8940_FORMATS, 651 }, 652 .ops = &wm8940_dai_ops, 653 .symmetric_rates = 1, 654 }; 655 656 static int wm8940_suspend(struct snd_soc_codec *codec, pm_message_t state) 657 { 658 return wm8940_set_bias_level(codec, SND_SOC_BIAS_OFF); 659 } 660 661 static int wm8940_resume(struct snd_soc_codec *codec) 662 { 663 int i; 664 int ret; 665 u8 data[3]; 666 u16 *cache = codec->reg_cache; 667 668 /* Sync reg_cache with the hardware 669 * Could use auto incremented writes to speed this up 670 */ 671 for (i = 0; i < ARRAY_SIZE(wm8940_reg_defaults); i++) { 672 data[0] = i; 673 data[1] = (cache[i] & 0xFF00) >> 8; 674 data[2] = cache[i] & 0x00FF; 675 ret = codec->hw_write(codec->control_data, data, 3); 676 if (ret < 0) 677 goto error_ret; 678 else if (ret != 3) { 679 ret = -EIO; 680 goto error_ret; 681 } 682 } 683 ret = wm8940_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 684 685 error_ret: 686 return ret; 687 } 688 689 static int wm8940_probe(struct snd_soc_codec *codec) 690 { 691 struct wm8940_priv *wm8940 = snd_soc_codec_get_drvdata(codec); 692 struct wm8940_setup_data *pdata = codec->dev->platform_data; 693 int ret; 694 u16 reg; 695 696 codec->control_data = wm8940->control_data; 697 ret = snd_soc_codec_set_cache_io(codec, 8, 16, wm8940->control_type); 698 if (ret < 0) { 699 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret); 700 return ret; 701 } 702 703 ret = wm8940_reset(codec); 704 if (ret < 0) { 705 dev_err(codec->dev, "Failed to issue reset\n"); 706 return ret; 707 } 708 709 wm8940_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 710 711 ret = snd_soc_write(codec, WM8940_POWER1, 0x180); 712 if (ret < 0) 713 return ret; 714 715 if (!pdata) 716 dev_warn(codec->dev, "No platform data supplied\n"); 717 else { 718 reg = snd_soc_read(codec, WM8940_OUTPUTCTL); 719 ret = snd_soc_write(codec, WM8940_OUTPUTCTL, reg | pdata->vroi); 720 if (ret < 0) 721 return ret; 722 } 723 724 ret = snd_soc_add_controls(codec, wm8940_snd_controls, 725 ARRAY_SIZE(wm8940_snd_controls)); 726 if (ret) 727 return ret; 728 ret = wm8940_add_widgets(codec); 729 return ret; 730 } 731 732 static int wm8940_remove(struct snd_soc_codec *codec) 733 { 734 wm8940_set_bias_level(codec, SND_SOC_BIAS_OFF); 735 return 0; 736 } 737 738 static struct snd_soc_codec_driver soc_codec_dev_wm8940 = { 739 .probe = wm8940_probe, 740 .remove = wm8940_remove, 741 .suspend = wm8940_suspend, 742 .resume = wm8940_resume, 743 .set_bias_level = wm8940_set_bias_level, 744 .reg_cache_size = ARRAY_SIZE(wm8940_reg_defaults), 745 .reg_word_size = sizeof(u16), 746 .reg_cache_default = wm8940_reg_defaults, 747 }; 748 749 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 750 static __devinit int wm8940_i2c_probe(struct i2c_client *i2c, 751 const struct i2c_device_id *id) 752 { 753 struct wm8940_priv *wm8940; 754 int ret; 755 756 wm8940 = kzalloc(sizeof(struct wm8940_priv), GFP_KERNEL); 757 if (wm8940 == NULL) 758 return -ENOMEM; 759 760 i2c_set_clientdata(i2c, wm8940); 761 wm8940->control_data = i2c; 762 wm8940->control_type = SND_SOC_I2C; 763 764 ret = snd_soc_register_codec(&i2c->dev, 765 &soc_codec_dev_wm8940, &wm8940_dai, 1); 766 if (ret < 0) 767 kfree(wm8940); 768 return ret; 769 } 770 771 static __devexit int wm8940_i2c_remove(struct i2c_client *client) 772 { 773 snd_soc_unregister_codec(&client->dev); 774 kfree(i2c_get_clientdata(client)); 775 return 0; 776 } 777 778 static const struct i2c_device_id wm8940_i2c_id[] = { 779 { "wm8940", 0 }, 780 { } 781 }; 782 MODULE_DEVICE_TABLE(i2c, wm8940_i2c_id); 783 784 static struct i2c_driver wm8940_i2c_driver = { 785 .driver = { 786 .name = "wm8940-codec", 787 .owner = THIS_MODULE, 788 }, 789 .probe = wm8940_i2c_probe, 790 .remove = __devexit_p(wm8940_i2c_remove), 791 .id_table = wm8940_i2c_id, 792 }; 793 #endif 794 795 static int __init wm8940_modinit(void) 796 { 797 int ret = 0; 798 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 799 ret = i2c_add_driver(&wm8940_i2c_driver); 800 if (ret != 0) { 801 printk(KERN_ERR "Failed to register wm8940 I2C driver: %d\n", 802 ret); 803 } 804 #endif 805 return ret; 806 } 807 module_init(wm8940_modinit); 808 809 static void __exit wm8940_exit(void) 810 { 811 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 812 i2c_del_driver(&wm8940_i2c_driver); 813 #endif 814 } 815 module_exit(wm8940_exit); 816 817 MODULE_DESCRIPTION("ASoC WM8940 driver"); 818 MODULE_AUTHOR("Jonathan Cameron"); 819 MODULE_LICENSE("GPL"); 820