1// SPDX-License-Identifier: GPL-2.0-or-later 2/* 3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz> 4 * Universal routines for AK4531 codec 5 */ 6 7#include <linux/delay.h> 8#include <linux/init.h> 9#include <linux/slab.h> 10#include <linux/mutex.h> 11#include <linux/module.h> 12 13#include <sound/core.h> 14#include <sound/ak4531_codec.h> 15#include <sound/tlv.h> 16 17/* 18MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>"); 19MODULE_DESCRIPTION("Universal routines for AK4531 codec"); 20MODULE_LICENSE("GPL"); 21*/ 22 23static void snd_ak4531_proc_init(struct snd_card *card, struct snd_ak4531 *ak4531); 24 25/* 26 * 27 */ 28 29#if 0 30 31static void snd_ak4531_dump(struct snd_ak4531 *ak4531) 32{ 33 int idx; 34 35 for (idx = 0; idx < 0x19; idx++) 36 printk(KERN_DEBUG "ak4531 0x%x: 0x%x\n", 37 idx, ak4531->regs[idx]); 38} 39 40#endif 41 42/* 43 * 44 */ 45 46#define AK4531_SINGLE(xname, xindex, reg, shift, mask, invert) \ 47{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \ 48 .info = snd_ak4531_info_single, \ 49 .get = snd_ak4531_get_single, .put = snd_ak4531_put_single, \ 50 .private_value = reg | (shift << 16) | (mask << 24) | (invert << 22) } 51#define AK4531_SINGLE_TLV(xname, xindex, reg, shift, mask, invert, xtlv) \ 52{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \ 53 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ, \ 54 .name = xname, .index = xindex, \ 55 .info = snd_ak4531_info_single, \ 56 .get = snd_ak4531_get_single, .put = snd_ak4531_put_single, \ 57 .private_value = reg | (shift << 16) | (mask << 24) | (invert << 22), \ 58 .tlv = { .p = (xtlv) } } 59 60static int snd_ak4531_info_single(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) 61{ 62 int mask = (kcontrol->private_value >> 24) & 0xff; 63 64 uinfo->type = mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER; 65 uinfo->count = 1; 66 uinfo->value.integer.min = 0; 67 uinfo->value.integer.max = mask; 68 return 0; 69} 70 71static int snd_ak4531_get_single(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) 72{ 73 struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol); 74 int reg = kcontrol->private_value & 0xff; 75 int shift = (kcontrol->private_value >> 16) & 0x07; 76 int mask = (kcontrol->private_value >> 24) & 0xff; 77 int invert = (kcontrol->private_value >> 22) & 1; 78 int val; 79 80 mutex_lock(&ak4531->reg_mutex); 81 val = (ak4531->regs[reg] >> shift) & mask; 82 mutex_unlock(&ak4531->reg_mutex); 83 if (invert) { 84 val = mask - val; 85 } 86 ucontrol->value.integer.value[0] = val; 87 return 0; 88} 89 90static int snd_ak4531_put_single(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) 91{ 92 struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol); 93 int reg = kcontrol->private_value & 0xff; 94 int shift = (kcontrol->private_value >> 16) & 0x07; 95 int mask = (kcontrol->private_value >> 24) & 0xff; 96 int invert = (kcontrol->private_value >> 22) & 1; 97 int change; 98 int val; 99 100 val = ucontrol->value.integer.value[0] & mask; 101 if (invert) { 102 val = mask - val; 103 } 104 val <<= shift; 105 mutex_lock(&ak4531->reg_mutex); 106 val = (ak4531->regs[reg] & ~(mask << shift)) | val; 107 change = val != ak4531->regs[reg]; 108 ak4531->write(ak4531, reg, ak4531->regs[reg] = val); 109 mutex_unlock(&ak4531->reg_mutex); 110 return change; 111} 112 113#define AK4531_DOUBLE(xname, xindex, left_reg, right_reg, left_shift, right_shift, mask, invert) \ 114{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \ 115 .info = snd_ak4531_info_double, \ 116 .get = snd_ak4531_get_double, .put = snd_ak4531_put_double, \ 117 .private_value = left_reg | (right_reg << 8) | (left_shift << 16) | (right_shift << 19) | (mask << 24) | (invert << 22) } 118#define AK4531_DOUBLE_TLV(xname, xindex, left_reg, right_reg, left_shift, right_shift, mask, invert, xtlv) \ 119{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \ 120 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ, \ 121 .name = xname, .index = xindex, \ 122 .info = snd_ak4531_info_double, \ 123 .get = snd_ak4531_get_double, .put = snd_ak4531_put_double, \ 124 .private_value = left_reg | (right_reg << 8) | (left_shift << 16) | (right_shift << 19) | (mask << 24) | (invert << 22), \ 125 .tlv = { .p = (xtlv) } } 126 127static int snd_ak4531_info_double(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) 128{ 129 int mask = (kcontrol->private_value >> 24) & 0xff; 130 131 uinfo->type = mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER; 132 uinfo->count = 2; 133 uinfo->value.integer.min = 0; 134 uinfo->value.integer.max = mask; 135 return 0; 136} 137 138static int snd_ak4531_get_double(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) 139{ 140 struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol); 141 int left_reg = kcontrol->private_value & 0xff; 142 int right_reg = (kcontrol->private_value >> 8) & 0xff; 143 int left_shift = (kcontrol->private_value >> 16) & 0x07; 144 int right_shift = (kcontrol->private_value >> 19) & 0x07; 145 int mask = (kcontrol->private_value >> 24) & 0xff; 146 int invert = (kcontrol->private_value >> 22) & 1; 147 int left, right; 148 149 mutex_lock(&ak4531->reg_mutex); 150 left = (ak4531->regs[left_reg] >> left_shift) & mask; 151 right = (ak4531->regs[right_reg] >> right_shift) & mask; 152 mutex_unlock(&ak4531->reg_mutex); 153 if (invert) { 154 left = mask - left; 155 right = mask - right; 156 } 157 ucontrol->value.integer.value[0] = left; 158 ucontrol->value.integer.value[1] = right; 159 return 0; 160} 161 162static int snd_ak4531_put_double(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) 163{ 164 struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol); 165 int left_reg = kcontrol->private_value & 0xff; 166 int right_reg = (kcontrol->private_value >> 8) & 0xff; 167 int left_shift = (kcontrol->private_value >> 16) & 0x07; 168 int right_shift = (kcontrol->private_value >> 19) & 0x07; 169 int mask = (kcontrol->private_value >> 24) & 0xff; 170 int invert = (kcontrol->private_value >> 22) & 1; 171 int change; 172 int left, right; 173 174 left = ucontrol->value.integer.value[0] & mask; 175 right = ucontrol->value.integer.value[1] & mask; 176 if (invert) { 177 left = mask - left; 178 right = mask - right; 179 } 180 left <<= left_shift; 181 right <<= right_shift; 182 mutex_lock(&ak4531->reg_mutex); 183 if (left_reg == right_reg) { 184 left = (ak4531->regs[left_reg] & ~((mask << left_shift) | (mask << right_shift))) | left | right; 185 change = left != ak4531->regs[left_reg]; 186 ak4531->write(ak4531, left_reg, ak4531->regs[left_reg] = left); 187 } else { 188 left = (ak4531->regs[left_reg] & ~(mask << left_shift)) | left; 189 right = (ak4531->regs[right_reg] & ~(mask << right_shift)) | right; 190 change = left != ak4531->regs[left_reg] || right != ak4531->regs[right_reg]; 191 ak4531->write(ak4531, left_reg, ak4531->regs[left_reg] = left); 192 ak4531->write(ak4531, right_reg, ak4531->regs[right_reg] = right); 193 } 194 mutex_unlock(&ak4531->reg_mutex); 195 return change; 196} 197 198#define AK4531_INPUT_SW(xname, xindex, reg1, reg2, left_shift, right_shift) \ 199{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \ 200 .info = snd_ak4531_info_input_sw, \ 201 .get = snd_ak4531_get_input_sw, .put = snd_ak4531_put_input_sw, \ 202 .private_value = reg1 | (reg2 << 8) | (left_shift << 16) | (right_shift << 24) } 203 204static int snd_ak4531_info_input_sw(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) 205{ 206 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN; 207 uinfo->count = 4; 208 uinfo->value.integer.min = 0; 209 uinfo->value.integer.max = 1; 210 return 0; 211} 212 213static int snd_ak4531_get_input_sw(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) 214{ 215 struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol); 216 int reg1 = kcontrol->private_value & 0xff; 217 int reg2 = (kcontrol->private_value >> 8) & 0xff; 218 int left_shift = (kcontrol->private_value >> 16) & 0x0f; 219 int right_shift = (kcontrol->private_value >> 24) & 0x0f; 220 221 mutex_lock(&ak4531->reg_mutex); 222 ucontrol->value.integer.value[0] = (ak4531->regs[reg1] >> left_shift) & 1; 223 ucontrol->value.integer.value[1] = (ak4531->regs[reg2] >> left_shift) & 1; 224 ucontrol->value.integer.value[2] = (ak4531->regs[reg1] >> right_shift) & 1; 225 ucontrol->value.integer.value[3] = (ak4531->regs[reg2] >> right_shift) & 1; 226 mutex_unlock(&ak4531->reg_mutex); 227 return 0; 228} 229 230static int snd_ak4531_put_input_sw(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) 231{ 232 struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol); 233 int reg1 = kcontrol->private_value & 0xff; 234 int reg2 = (kcontrol->private_value >> 8) & 0xff; 235 int left_shift = (kcontrol->private_value >> 16) & 0x0f; 236 int right_shift = (kcontrol->private_value >> 24) & 0x0f; 237 int change; 238 int val1, val2; 239 240 mutex_lock(&ak4531->reg_mutex); 241 val1 = ak4531->regs[reg1] & ~((1 << left_shift) | (1 << right_shift)); 242 val2 = ak4531->regs[reg2] & ~((1 << left_shift) | (1 << right_shift)); 243 val1 |= (ucontrol->value.integer.value[0] & 1) << left_shift; 244 val2 |= (ucontrol->value.integer.value[1] & 1) << left_shift; 245 val1 |= (ucontrol->value.integer.value[2] & 1) << right_shift; 246 val2 |= (ucontrol->value.integer.value[3] & 1) << right_shift; 247 change = val1 != ak4531->regs[reg1] || val2 != ak4531->regs[reg2]; 248 ak4531->write(ak4531, reg1, ak4531->regs[reg1] = val1); 249 ak4531->write(ak4531, reg2, ak4531->regs[reg2] = val2); 250 mutex_unlock(&ak4531->reg_mutex); 251 return change; 252} 253 254static const DECLARE_TLV_DB_SCALE(db_scale_master, -6200, 200, 0); 255static const DECLARE_TLV_DB_SCALE(db_scale_mono, -2800, 400, 0); 256static const DECLARE_TLV_DB_SCALE(db_scale_input, -5000, 200, 0); 257 258static const struct snd_kcontrol_new snd_ak4531_controls[] = { 259 260AK4531_DOUBLE_TLV("Master Playback Switch", 0, 261 AK4531_LMASTER, AK4531_RMASTER, 7, 7, 1, 1, 262 db_scale_master), 263AK4531_DOUBLE("Master Playback Volume", 0, AK4531_LMASTER, AK4531_RMASTER, 0, 0, 0x1f, 1), 264 265AK4531_SINGLE_TLV("Master Mono Playback Switch", 0, AK4531_MONO_OUT, 7, 1, 1, 266 db_scale_mono), 267AK4531_SINGLE("Master Mono Playback Volume", 0, AK4531_MONO_OUT, 0, 0x07, 1), 268 269AK4531_DOUBLE("PCM Switch", 0, AK4531_LVOICE, AK4531_RVOICE, 7, 7, 1, 1), 270AK4531_DOUBLE_TLV("PCM Volume", 0, AK4531_LVOICE, AK4531_RVOICE, 0, 0, 0x1f, 1, 271 db_scale_input), 272AK4531_DOUBLE("PCM Playback Switch", 0, AK4531_OUT_SW2, AK4531_OUT_SW2, 3, 2, 1, 0), 273AK4531_DOUBLE("PCM Capture Switch", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 2, 2, 1, 0), 274 275AK4531_DOUBLE("PCM Switch", 1, AK4531_LFM, AK4531_RFM, 7, 7, 1, 1), 276AK4531_DOUBLE_TLV("PCM Volume", 1, AK4531_LFM, AK4531_RFM, 0, 0, 0x1f, 1, 277 db_scale_input), 278AK4531_DOUBLE("PCM Playback Switch", 1, AK4531_OUT_SW1, AK4531_OUT_SW1, 6, 5, 1, 0), 279AK4531_INPUT_SW("PCM Capture Route", 1, AK4531_LIN_SW1, AK4531_RIN_SW1, 6, 5), 280 281AK4531_DOUBLE("CD Switch", 0, AK4531_LCD, AK4531_RCD, 7, 7, 1, 1), 282AK4531_DOUBLE_TLV("CD Volume", 0, AK4531_LCD, AK4531_RCD, 0, 0, 0x1f, 1, 283 db_scale_input), 284AK4531_DOUBLE("CD Playback Switch", 0, AK4531_OUT_SW1, AK4531_OUT_SW1, 2, 1, 1, 0), 285AK4531_INPUT_SW("CD Capture Route", 0, AK4531_LIN_SW1, AK4531_RIN_SW1, 2, 1), 286 287AK4531_DOUBLE("Line Switch", 0, AK4531_LLINE, AK4531_RLINE, 7, 7, 1, 1), 288AK4531_DOUBLE_TLV("Line Volume", 0, AK4531_LLINE, AK4531_RLINE, 0, 0, 0x1f, 1, 289 db_scale_input), 290AK4531_DOUBLE("Line Playback Switch", 0, AK4531_OUT_SW1, AK4531_OUT_SW1, 4, 3, 1, 0), 291AK4531_INPUT_SW("Line Capture Route", 0, AK4531_LIN_SW1, AK4531_RIN_SW1, 4, 3), 292 293AK4531_DOUBLE("Aux Switch", 0, AK4531_LAUXA, AK4531_RAUXA, 7, 7, 1, 1), 294AK4531_DOUBLE_TLV("Aux Volume", 0, AK4531_LAUXA, AK4531_RAUXA, 0, 0, 0x1f, 1, 295 db_scale_input), 296AK4531_DOUBLE("Aux Playback Switch", 0, AK4531_OUT_SW2, AK4531_OUT_SW2, 5, 4, 1, 0), 297AK4531_INPUT_SW("Aux Capture Route", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 4, 3), 298 299AK4531_SINGLE("Mono Switch", 0, AK4531_MONO1, 7, 1, 1), 300AK4531_SINGLE_TLV("Mono Volume", 0, AK4531_MONO1, 0, 0x1f, 1, db_scale_input), 301AK4531_SINGLE("Mono Playback Switch", 0, AK4531_OUT_SW2, 0, 1, 0), 302AK4531_DOUBLE("Mono Capture Switch", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 0, 0, 1, 0), 303 304AK4531_SINGLE("Mono Switch", 1, AK4531_MONO2, 7, 1, 1), 305AK4531_SINGLE_TLV("Mono Volume", 1, AK4531_MONO2, 0, 0x1f, 1, db_scale_input), 306AK4531_SINGLE("Mono Playback Switch", 1, AK4531_OUT_SW2, 1, 1, 0), 307AK4531_DOUBLE("Mono Capture Switch", 1, AK4531_LIN_SW2, AK4531_RIN_SW2, 1, 1, 1, 0), 308 309AK4531_SINGLE_TLV("Mic Volume", 0, AK4531_MIC, 0, 0x1f, 1, db_scale_input), 310AK4531_SINGLE("Mic Switch", 0, AK4531_MIC, 7, 1, 1), 311AK4531_SINGLE("Mic Playback Switch", 0, AK4531_OUT_SW1, 0, 1, 0), 312AK4531_DOUBLE("Mic Capture Switch", 0, AK4531_LIN_SW1, AK4531_RIN_SW1, 0, 0, 1, 0), 313 314AK4531_DOUBLE("Mic Bypass Capture Switch", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 7, 7, 1, 0), 315AK4531_DOUBLE("Mono1 Bypass Capture Switch", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 6, 6, 1, 0), 316AK4531_DOUBLE("Mono2 Bypass Capture Switch", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 5, 5, 1, 0), 317 318AK4531_SINGLE("AD Input Select", 0, AK4531_AD_IN, 0, 1, 0), 319AK4531_SINGLE("Mic Boost (+30dB)", 0, AK4531_MIC_GAIN, 0, 1, 0) 320}; 321 322static int snd_ak4531_free(struct snd_ak4531 *ak4531) 323{ 324 if (ak4531) { 325 if (ak4531->private_free) 326 ak4531->private_free(ak4531); 327 kfree(ak4531); 328 } 329 return 0; 330} 331 332static int snd_ak4531_dev_free(struct snd_device *device) 333{ 334 struct snd_ak4531 *ak4531 = device->device_data; 335 return snd_ak4531_free(ak4531); 336} 337 338static const u8 snd_ak4531_initial_map[0x19 + 1] = { 339 0x9f, /* 00: Master Volume Lch */ 340 0x9f, /* 01: Master Volume Rch */ 341 0x9f, /* 02: Voice Volume Lch */ 342 0x9f, /* 03: Voice Volume Rch */ 343 0x9f, /* 04: FM Volume Lch */ 344 0x9f, /* 05: FM Volume Rch */ 345 0x9f, /* 06: CD Audio Volume Lch */ 346 0x9f, /* 07: CD Audio Volume Rch */ 347 0x9f, /* 08: Line Volume Lch */ 348 0x9f, /* 09: Line Volume Rch */ 349 0x9f, /* 0a: Aux Volume Lch */ 350 0x9f, /* 0b: Aux Volume Rch */ 351 0x9f, /* 0c: Mono1 Volume */ 352 0x9f, /* 0d: Mono2 Volume */ 353 0x9f, /* 0e: Mic Volume */ 354 0x87, /* 0f: Mono-out Volume */ 355 0x00, /* 10: Output Mixer SW1 */ 356 0x00, /* 11: Output Mixer SW2 */ 357 0x00, /* 12: Lch Input Mixer SW1 */ 358 0x00, /* 13: Rch Input Mixer SW1 */ 359 0x00, /* 14: Lch Input Mixer SW2 */ 360 0x00, /* 15: Rch Input Mixer SW2 */ 361 0x00, /* 16: Reset & Power Down */ 362 0x00, /* 17: Clock Select */ 363 0x00, /* 18: AD Input Select */ 364 0x01 /* 19: Mic Amp Setup */ 365}; 366 367int snd_ak4531_mixer(struct snd_card *card, 368 struct snd_ak4531 *_ak4531, 369 struct snd_ak4531 **rak4531) 370{ 371 unsigned int idx; 372 int err; 373 struct snd_ak4531 *ak4531; 374 static const struct snd_device_ops ops = { 375 .dev_free = snd_ak4531_dev_free, 376 }; 377 378 if (snd_BUG_ON(!card || !_ak4531)) 379 return -EINVAL; 380 if (rak4531) 381 *rak4531 = NULL; 382 ak4531 = kzalloc(sizeof(*ak4531), GFP_KERNEL); 383 if (ak4531 == NULL) 384 return -ENOMEM; 385 *ak4531 = *_ak4531; 386 mutex_init(&ak4531->reg_mutex); 387 err = snd_component_add(card, "AK4531"); 388 if (err < 0) { 389 snd_ak4531_free(ak4531); 390 return err; 391 } 392 strcpy(card->mixername, "Asahi Kasei AK4531"); 393 ak4531->write(ak4531, AK4531_RESET, 0x03); /* no RST, PD */ 394 udelay(100); 395 ak4531->write(ak4531, AK4531_CLOCK, 0x00); /* CODEC ADC and CODEC DAC use {LR,B}CLK2 and run off LRCLK2 PLL */ 396 for (idx = 0; idx <= 0x19; idx++) { 397 if (idx == AK4531_RESET || idx == AK4531_CLOCK) 398 continue; 399 ak4531->write(ak4531, idx, ak4531->regs[idx] = snd_ak4531_initial_map[idx]); /* recording source is mixer */ 400 } 401 for (idx = 0; idx < ARRAY_SIZE(snd_ak4531_controls); idx++) { 402 err = snd_ctl_add(card, snd_ctl_new1(&snd_ak4531_controls[idx], ak4531)); 403 if (err < 0) { 404 snd_ak4531_free(ak4531); 405 return err; 406 } 407 } 408 snd_ak4531_proc_init(card, ak4531); 409 err = snd_device_new(card, SNDRV_DEV_CODEC, ak4531, &ops); 410 if (err < 0) { 411 snd_ak4531_free(ak4531); 412 return err; 413 } 414 415#if 0 416 snd_ak4531_dump(ak4531); 417#endif 418 if (rak4531) 419 *rak4531 = ak4531; 420 return 0; 421} 422 423/* 424 * power management 425 */ 426#ifdef CONFIG_PM 427void snd_ak4531_suspend(struct snd_ak4531 *ak4531) 428{ 429 /* mute */ 430 ak4531->write(ak4531, AK4531_LMASTER, 0x9f); 431 ak4531->write(ak4531, AK4531_RMASTER, 0x9f); 432 /* powerdown */ 433 ak4531->write(ak4531, AK4531_RESET, 0x01); 434} 435 436void snd_ak4531_resume(struct snd_ak4531 *ak4531) 437{ 438 int idx; 439 440 /* initialize */ 441 ak4531->write(ak4531, AK4531_RESET, 0x03); 442 udelay(100); 443 ak4531->write(ak4531, AK4531_CLOCK, 0x00); 444 /* restore mixer registers */ 445 for (idx = 0; idx <= 0x19; idx++) { 446 if (idx == AK4531_RESET || idx == AK4531_CLOCK) 447 continue; 448 ak4531->write(ak4531, idx, ak4531->regs[idx]); 449 } 450} 451#endif 452 453/* 454 * /proc interface 455 */ 456 457static void snd_ak4531_proc_read(struct snd_info_entry *entry, 458 struct snd_info_buffer *buffer) 459{ 460 struct snd_ak4531 *ak4531 = entry->private_data; 461 462 snd_iprintf(buffer, "Asahi Kasei AK4531\n\n"); 463 snd_iprintf(buffer, "Recording source : %s\n" 464 "MIC gain : %s\n", 465 ak4531->regs[AK4531_AD_IN] & 1 ? "external" : "mixer", 466 ak4531->regs[AK4531_MIC_GAIN] & 1 ? "+30dB" : "+0dB"); 467} 468 469static void 470snd_ak4531_proc_init(struct snd_card *card, struct snd_ak4531 *ak4531) 471{ 472 snd_card_ro_proc_new(card, "ak4531", ak4531, snd_ak4531_proc_read); 473} 474