sound/pci/ak4531_codec.c

0001 // SPDX-License-Identifier: GPL-2.0-or-later
0002 /*
0003  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
0004  *  Universal routines for AK4531 codec
0005  */
0006
0007 #include <linux/delay.h>
0008 #include <linux/init.h>
0009 #include <linux/slab.h>
0010 #include <linux/mutex.h>
0011 #include <linux/module.h>
0012
0013 #include <sound/core.h>
0014 #include <sound/ak4531_codec.h>
0015 #include <sound/tlv.h>
0016
0017 /*
0018 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
0019 MODULE_DESCRIPTION("Universal routines for AK4531 codec");
0020 MODULE_LICENSE("GPL");
0021 */
0022
0023 static void snd_ak4531_proc_init(struct snd_card *card, struct snd_ak4531 *ak4531);
0024
0025 /*
0026  *
0027  */
0028
0029 #if 0
0030
0031 static void snd_ak4531_dump(struct snd_ak4531 *ak4531)
0032 {
0033     int idx;
0034
0035     for (idx = 0; idx < 0x19; idx++)
0036         printk(KERN_DEBUG "ak4531 0x%x: 0x%x\n",
0037                idx, ak4531->regs[idx]);
0038 }
0039
0040 #endif
0041
0042 /*
0043  *
0044  */
0045
0046 #define AK4531_SINGLE(xname, xindex, reg, shift, mask, invert) \
0047 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
0048   .info = snd_ak4531_info_single, \
0049   .get = snd_ak4531_get_single, .put = snd_ak4531_put_single, \
0050   .private_value = reg | (shift << 16) | (mask << 24) | (invert << 22) }
0051 #define AK4531_SINGLE_TLV(xname, xindex, reg, shift, mask, invert, xtlv)    \
0052 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
0053   .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ, \
0054   .name = xname, .index = xindex, \
0055   .info = snd_ak4531_info_single, \
0056   .get = snd_ak4531_get_single, .put = snd_ak4531_put_single, \
0057   .private_value = reg | (shift << 16) | (mask << 24) | (invert << 22), \
0058   .tlv = { .p = (xtlv) } }
0059
0060 static int snd_ak4531_info_single(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
0061 {
0062     int mask = (kcontrol->private_value >> 24) & 0xff;
0063
0064     uinfo->type = mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
0065     uinfo->count = 1;
0066     uinfo->value.integer.min = 0;
0067     uinfo->value.integer.max = mask;
0068     return 0;
0069 }
0070
0071 static int snd_ak4531_get_single(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
0072 {
0073     struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol);
0074     int reg = kcontrol->private_value & 0xff;
0075     int shift = (kcontrol->private_value >> 16) & 0x07;
0076     int mask = (kcontrol->private_value >> 24) & 0xff;
0077     int invert = (kcontrol->private_value >> 22) & 1;
0078     int val;
0079
0080     mutex_lock(&ak4531->reg_mutex);
0081     val = (ak4531->regs[reg] >> shift) & mask;
0082     mutex_unlock(&ak4531->reg_mutex);
0083     if (invert) {
0084         val = mask - val;
0085     }
0086     ucontrol->value.integer.value[0] = val;
0087     return 0;
0088 }
0089
0090 static int snd_ak4531_put_single(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
0091 {
0092     struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol);
0093     int reg = kcontrol->private_value & 0xff;
0094     int shift = (kcontrol->private_value >> 16) & 0x07;
0095     int mask = (kcontrol->private_value >> 24) & 0xff;
0096     int invert = (kcontrol->private_value >> 22) & 1;
0097     int change;
0098     int val;
0099
0100     val = ucontrol->value.integer.value[0] & mask;
0101     if (invert) {
0102         val = mask - val;
0103     }
0104     val <<= shift;
0105     mutex_lock(&ak4531->reg_mutex);
0106     val = (ak4531->regs[reg] & ~(mask << shift)) | val;
0107     change = val != ak4531->regs[reg];
0108     ak4531->write(ak4531, reg, ak4531->regs[reg] = val);
0109     mutex_unlock(&ak4531->reg_mutex);
0110     return change;
0111 }
0112
0113 #define AK4531_DOUBLE(xname, xindex, left_reg, right_reg, left_shift, right_shift, mask, invert) \
0114 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
0115   .info = snd_ak4531_info_double, \
0116   .get = snd_ak4531_get_double, .put = snd_ak4531_put_double, \
0117   .private_value = left_reg | (right_reg << 8) | (left_shift << 16) | (right_shift << 19) | (mask << 24) | (invert << 22) }
0118 #define AK4531_DOUBLE_TLV(xname, xindex, left_reg, right_reg, left_shift, right_shift, mask, invert, xtlv) \
0119 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
0120   .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ, \
0121   .name = xname, .index = xindex, \
0122   .info = snd_ak4531_info_double, \
0123   .get = snd_ak4531_get_double, .put = snd_ak4531_put_double, \
0124   .private_value = left_reg | (right_reg << 8) | (left_shift << 16) | (right_shift << 19) | (mask << 24) | (invert << 22), \
0125   .tlv = { .p = (xtlv) } }
0126
0127 static int snd_ak4531_info_double(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
0128 {
0129     int mask = (kcontrol->private_value >> 24) & 0xff;
0130
0131     uinfo->type = mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
0132     uinfo->count = 2;
0133     uinfo->value.integer.min = 0;
0134     uinfo->value.integer.max = mask;
0135     return 0;
0136 }
0137
0138 static int snd_ak4531_get_double(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
0139 {
0140     struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol);
0141     int left_reg = kcontrol->private_value & 0xff;
0142     int right_reg = (kcontrol->private_value >> 8) & 0xff;
0143     int left_shift = (kcontrol->private_value >> 16) & 0x07;
0144     int right_shift = (kcontrol->private_value >> 19) & 0x07;
0145     int mask = (kcontrol->private_value >> 24) & 0xff;
0146     int invert = (kcontrol->private_value >> 22) & 1;
0147     int left, right;
0148
0149     mutex_lock(&ak4531->reg_mutex);
0150     left = (ak4531->regs[left_reg] >> left_shift) & mask;
0151     right = (ak4531->regs[right_reg] >> right_shift) & mask;
0152     mutex_unlock(&ak4531->reg_mutex);
0153     if (invert) {
0154         left = mask - left;
0155         right = mask - right;
0156     }
0157     ucontrol->value.integer.value[0] = left;
0158     ucontrol->value.integer.value[1] = right;
0159     return 0;
0160 }
0161
0162 static int snd_ak4531_put_double(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
0163 {
0164     struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol);
0165     int left_reg = kcontrol->private_value & 0xff;
0166     int right_reg = (kcontrol->private_value >> 8) & 0xff;
0167     int left_shift = (kcontrol->private_value >> 16) & 0x07;
0168     int right_shift = (kcontrol->private_value >> 19) & 0x07;
0169     int mask = (kcontrol->private_value >> 24) & 0xff;
0170     int invert = (kcontrol->private_value >> 22) & 1;
0171     int change;
0172     int left, right;
0173
0174     left = ucontrol->value.integer.value[0] & mask;
0175     right = ucontrol->value.integer.value[1] & mask;
0176     if (invert) {
0177         left = mask - left;
0178         right = mask - right;
0179     }
0180     left <<= left_shift;
0181     right <<= right_shift;
0182     mutex_lock(&ak4531->reg_mutex);
0183     if (left_reg == right_reg) {
0184         left = (ak4531->regs[left_reg] & ~((mask << left_shift) | (mask << right_shift))) | left | right;
0185         change = left != ak4531->regs[left_reg];
0186         ak4531->write(ak4531, left_reg, ak4531->regs[left_reg] = left);
0187     } else {
0188         left = (ak4531->regs[left_reg] & ~(mask << left_shift)) | left;
0189         right = (ak4531->regs[right_reg] & ~(mask << right_shift)) | right;
0190         change = left != ak4531->regs[left_reg] || right != ak4531->regs[right_reg];
0191         ak4531->write(ak4531, left_reg, ak4531->regs[left_reg] = left);
0192         ak4531->write(ak4531, right_reg, ak4531->regs[right_reg] = right);
0193     }
0194     mutex_unlock(&ak4531->reg_mutex);
0195     return change;
0196 }
0197
0198 #define AK4531_INPUT_SW(xname, xindex, reg1, reg2, left_shift, right_shift) \
0199 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
0200   .info = snd_ak4531_info_input_sw, \
0201   .get = snd_ak4531_get_input_sw, .put = snd_ak4531_put_input_sw, \
0202   .private_value = reg1 | (reg2 << 8) | (left_shift << 16) | (right_shift << 24) }
0203
0204 static int snd_ak4531_info_input_sw(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
0205 {
0206     uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
0207     uinfo->count = 4;
0208     uinfo->value.integer.min = 0;
0209     uinfo->value.integer.max = 1;
0210     return 0;
0211 }
0212
0213 static int snd_ak4531_get_input_sw(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
0214 {
0215     struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol);
0216     int reg1 = kcontrol->private_value & 0xff;
0217     int reg2 = (kcontrol->private_value >> 8) & 0xff;
0218     int left_shift = (kcontrol->private_value >> 16) & 0x0f;
0219     int right_shift = (kcontrol->private_value >> 24) & 0x0f;
0220
0221     mutex_lock(&ak4531->reg_mutex);
0222     ucontrol->value.integer.value[0] = (ak4531->regs[reg1] >> left_shift) & 1;
0223     ucontrol->value.integer.value[1] = (ak4531->regs[reg2] >> left_shift) & 1;
0224     ucontrol->value.integer.value[2] = (ak4531->regs[reg1] >> right_shift) & 1;
0225     ucontrol->value.integer.value[3] = (ak4531->regs[reg2] >> right_shift) & 1;
0226     mutex_unlock(&ak4531->reg_mutex);
0227     return 0;
0228 }
0229
0230 static int snd_ak4531_put_input_sw(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
0231 {
0232     struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol);
0233     int reg1 = kcontrol->private_value & 0xff;
0234     int reg2 = (kcontrol->private_value >> 8) & 0xff;
0235     int left_shift = (kcontrol->private_value >> 16) & 0x0f;
0236     int right_shift = (kcontrol->private_value >> 24) & 0x0f;
0237     int change;
0238     int val1, val2;
0239
0240     mutex_lock(&ak4531->reg_mutex);
0241     val1 = ak4531->regs[reg1] & ~((1 << left_shift) | (1 << right_shift));
0242     val2 = ak4531->regs[reg2] & ~((1 << left_shift) | (1 << right_shift));
0243     val1 |= (ucontrol->value.integer.value[0] & 1) << left_shift;
0244     val2 |= (ucontrol->value.integer.value[1] & 1) << left_shift;
0245     val1 |= (ucontrol->value.integer.value[2] & 1) << right_shift;
0246     val2 |= (ucontrol->value.integer.value[3] & 1) << right_shift;
0247     change = val1 != ak4531->regs[reg1] || val2 != ak4531->regs[reg2];
0248     ak4531->write(ak4531, reg1, ak4531->regs[reg1] = val1);
0249     ak4531->write(ak4531, reg2, ak4531->regs[reg2] = val2);
0250     mutex_unlock(&ak4531->reg_mutex);
0251     return change;
0252 }
0253
0254 static const DECLARE_TLV_DB_SCALE(db_scale_master, -6200, 200, 0);
0255 static const DECLARE_TLV_DB_SCALE(db_scale_mono, -2800, 400, 0);
0256 static const DECLARE_TLV_DB_SCALE(db_scale_input, -5000, 200, 0);
0257
0258 static const struct snd_kcontrol_new snd_ak4531_controls[] = {
0259
0260 AK4531_DOUBLE_TLV("Master Playback Switch", 0,
0261           AK4531_LMASTER, AK4531_RMASTER, 7, 7, 1, 1,
0262           db_scale_master),
0263 AK4531_DOUBLE("Master Playback Volume", 0, AK4531_LMASTER, AK4531_RMASTER, 0, 0, 0x1f, 1),
0264
0265 AK4531_SINGLE_TLV("Master Mono Playback Switch", 0, AK4531_MONO_OUT, 7, 1, 1,
0266           db_scale_mono),
0267 AK4531_SINGLE("Master Mono Playback Volume", 0, AK4531_MONO_OUT, 0, 0x07, 1),
0268
0269 AK4531_DOUBLE("PCM Switch", 0, AK4531_LVOICE, AK4531_RVOICE, 7, 7, 1, 1),
0270 AK4531_DOUBLE_TLV("PCM Volume", 0, AK4531_LVOICE, AK4531_RVOICE, 0, 0, 0x1f, 1,
0271           db_scale_input),
0272 AK4531_DOUBLE("PCM Playback Switch", 0, AK4531_OUT_SW2, AK4531_OUT_SW2, 3, 2, 1, 0),
0273 AK4531_DOUBLE("PCM Capture Switch", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 2, 2, 1, 0),
0274
0275 AK4531_DOUBLE("PCM Switch", 1, AK4531_LFM, AK4531_RFM, 7, 7, 1, 1),
0276 AK4531_DOUBLE_TLV("PCM Volume", 1, AK4531_LFM, AK4531_RFM, 0, 0, 0x1f, 1,
0277           db_scale_input),
0278 AK4531_DOUBLE("PCM Playback Switch", 1, AK4531_OUT_SW1, AK4531_OUT_SW1, 6, 5, 1, 0),
0279 AK4531_INPUT_SW("PCM Capture Route", 1, AK4531_LIN_SW1, AK4531_RIN_SW1, 6, 5),
0280
0281 AK4531_DOUBLE("CD Switch", 0, AK4531_LCD, AK4531_RCD, 7, 7, 1, 1),
0282 AK4531_DOUBLE_TLV("CD Volume", 0, AK4531_LCD, AK4531_RCD, 0, 0, 0x1f, 1,
0283           db_scale_input),
0284 AK4531_DOUBLE("CD Playback Switch", 0, AK4531_OUT_SW1, AK4531_OUT_SW1, 2, 1, 1, 0),
0285 AK4531_INPUT_SW("CD Capture Route", 0, AK4531_LIN_SW1, AK4531_RIN_SW1, 2, 1),
0286
0287 AK4531_DOUBLE("Line Switch", 0, AK4531_LLINE, AK4531_RLINE, 7, 7, 1, 1),
0288 AK4531_DOUBLE_TLV("Line Volume", 0, AK4531_LLINE, AK4531_RLINE, 0, 0, 0x1f, 1,
0289           db_scale_input),
0290 AK4531_DOUBLE("Line Playback Switch", 0, AK4531_OUT_SW1, AK4531_OUT_SW1, 4, 3, 1, 0),
0291 AK4531_INPUT_SW("Line Capture Route", 0, AK4531_LIN_SW1, AK4531_RIN_SW1, 4, 3),
0292
0293 AK4531_DOUBLE("Aux Switch", 0, AK4531_LAUXA, AK4531_RAUXA, 7, 7, 1, 1),
0294 AK4531_DOUBLE_TLV("Aux Volume", 0, AK4531_LAUXA, AK4531_RAUXA, 0, 0, 0x1f, 1,
0295           db_scale_input),
0296 AK4531_DOUBLE("Aux Playback Switch", 0, AK4531_OUT_SW2, AK4531_OUT_SW2, 5, 4, 1, 0),
0297 AK4531_INPUT_SW("Aux Capture Route", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 4, 3),
0298
0299 AK4531_SINGLE("Mono Switch", 0, AK4531_MONO1, 7, 1, 1),
0300 AK4531_SINGLE_TLV("Mono Volume", 0, AK4531_MONO1, 0, 0x1f, 1, db_scale_input),
0301 AK4531_SINGLE("Mono Playback Switch", 0, AK4531_OUT_SW2, 0, 1, 0),
0302 AK4531_DOUBLE("Mono Capture Switch", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 0, 0, 1, 0),
0303
0304 AK4531_SINGLE("Mono Switch", 1, AK4531_MONO2, 7, 1, 1),
0305 AK4531_SINGLE_TLV("Mono Volume", 1, AK4531_MONO2, 0, 0x1f, 1, db_scale_input),
0306 AK4531_SINGLE("Mono Playback Switch", 1, AK4531_OUT_SW2, 1, 1, 0),
0307 AK4531_DOUBLE("Mono Capture Switch", 1, AK4531_LIN_SW2, AK4531_RIN_SW2, 1, 1, 1, 0),
0308
0309 AK4531_SINGLE_TLV("Mic Volume", 0, AK4531_MIC, 0, 0x1f, 1, db_scale_input),
0310 AK4531_SINGLE("Mic Switch", 0, AK4531_MIC, 7, 1, 1),
0311 AK4531_SINGLE("Mic Playback Switch", 0, AK4531_OUT_SW1, 0, 1, 0),
0312 AK4531_DOUBLE("Mic Capture Switch", 0, AK4531_LIN_SW1, AK4531_RIN_SW1, 0, 0, 1, 0),
0313
0314 AK4531_DOUBLE("Mic Bypass Capture Switch", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 7, 7, 1, 0),
0315 AK4531_DOUBLE("Mono1 Bypass Capture Switch", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 6, 6, 1, 0),
0316 AK4531_DOUBLE("Mono2 Bypass Capture Switch", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 5, 5, 1, 0),
0317
0318 AK4531_SINGLE("AD Input Select", 0, AK4531_AD_IN, 0, 1, 0),
0319 AK4531_SINGLE("Mic Boost (+30dB)", 0, AK4531_MIC_GAIN, 0, 1, 0)
0320 };
0321
0322 static int snd_ak4531_free(struct snd_ak4531 *ak4531)
0323 {
0324     if (ak4531) {
0325         if (ak4531->private_free)
0326             ak4531->private_free(ak4531);
0327         kfree(ak4531);
0328     }
0329     return 0;
0330 }
0331
0332 static int snd_ak4531_dev_free(struct snd_device *device)
0333 {
0334     struct snd_ak4531 *ak4531 = device->device_data;
0335     return snd_ak4531_free(ak4531);
0336 }
0337
0338 static const u8 snd_ak4531_initial_map[0x19 + 1] = {
0339     0x9f,       /* 00: Master Volume Lch */
0340     0x9f,       /* 01: Master Volume Rch */
0341     0x9f,       /* 02: Voice Volume Lch */
0342     0x9f,       /* 03: Voice Volume Rch */
0343     0x9f,       /* 04: FM Volume Lch */
0344     0x9f,       /* 05: FM Volume Rch */
0345     0x9f,       /* 06: CD Audio Volume Lch */
0346     0x9f,       /* 07: CD Audio Volume Rch */
0347     0x9f,       /* 08: Line Volume Lch */
0348     0x9f,       /* 09: Line Volume Rch */
0349     0x9f,       /* 0a: Aux Volume Lch */
0350     0x9f,       /* 0b: Aux Volume Rch */
0351     0x9f,       /* 0c: Mono1 Volume */
0352     0x9f,       /* 0d: Mono2 Volume */
0353     0x9f,       /* 0e: Mic Volume */
0354     0x87,       /* 0f: Mono-out Volume */
0355     0x00,       /* 10: Output Mixer SW1 */
0356     0x00,       /* 11: Output Mixer SW2 */
0357     0x00,       /* 12: Lch Input Mixer SW1 */
0358     0x00,       /* 13: Rch Input Mixer SW1 */
0359     0x00,       /* 14: Lch Input Mixer SW2 */
0360     0x00,       /* 15: Rch Input Mixer SW2 */
0361     0x00,       /* 16: Reset & Power Down */
0362     0x00,       /* 17: Clock Select */
0363     0x00,       /* 18: AD Input Select */
0364     0x01        /* 19: Mic Amp Setup */
0365 };
0366
0367 int snd_ak4531_mixer(struct snd_card *card,
0368              struct snd_ak4531 *_ak4531,
0369              struct snd_ak4531 **rak4531)
0370 {
0371     unsigned int idx;
0372     int err;
0373     struct snd_ak4531 *ak4531;
0374     static const struct snd_device_ops ops = {
0375         .dev_free = snd_ak4531_dev_free,
0376     };
0377
0378     if (snd_BUG_ON(!card || !_ak4531))
0379         return -EINVAL;
0380     if (rak4531)
0381         *rak4531 = NULL;
0382     ak4531 = kzalloc(sizeof(*ak4531), GFP_KERNEL);
0383     if (ak4531 == NULL)
0384         return -ENOMEM;
0385     *ak4531 = *_ak4531;
0386     mutex_init(&ak4531->reg_mutex);
0387     err = snd_component_add(card, "AK4531");
0388     if (err < 0) {
0389         snd_ak4531_free(ak4531);
0390         return err;
0391     }
0392     strcpy(card->mixername, "Asahi Kasei AK4531");
0393     ak4531->write(ak4531, AK4531_RESET, 0x03);  /* no RST, PD */
0394     udelay(100);
0395     ak4531->write(ak4531, AK4531_CLOCK, 0x00);  /* CODEC ADC and CODEC DAC use {LR,B}CLK2 and run off LRCLK2 PLL */
0396     for (idx = 0; idx <= 0x19; idx++) {
0397         if (idx == AK4531_RESET || idx == AK4531_CLOCK)
0398             continue;
0399         ak4531->write(ak4531, idx, ak4531->regs[idx] = snd_ak4531_initial_map[idx]);    /* recording source is mixer */
0400     }
0401     for (idx = 0; idx < ARRAY_SIZE(snd_ak4531_controls); idx++) {
0402         err = snd_ctl_add(card, snd_ctl_new1(&snd_ak4531_controls[idx], ak4531));
0403         if (err < 0) {
0404             snd_ak4531_free(ak4531);
0405             return err;
0406         }
0407     }
0408     snd_ak4531_proc_init(card, ak4531);
0409     err = snd_device_new(card, SNDRV_DEV_CODEC, ak4531, &ops);
0410     if (err < 0) {
0411         snd_ak4531_free(ak4531);
0412         return err;
0413     }
0414
0415 #if 0
0416     snd_ak4531_dump(ak4531);
0417 #endif
0418     if (rak4531)
0419         *rak4531 = ak4531;
0420     return 0;
0421 }
0422
0423 /*
0424  * power management
0425  */
0426 #ifdef CONFIG_PM
0427 void snd_ak4531_suspend(struct snd_ak4531 *ak4531)
0428 {
0429     /* mute */
0430     ak4531->write(ak4531, AK4531_LMASTER, 0x9f);
0431     ak4531->write(ak4531, AK4531_RMASTER, 0x9f);
0432     /* powerdown */
0433     ak4531->write(ak4531, AK4531_RESET, 0x01);
0434 }
0435
0436 void snd_ak4531_resume(struct snd_ak4531 *ak4531)
0437 {
0438     int idx;
0439
0440     /* initialize */
0441     ak4531->write(ak4531, AK4531_RESET, 0x03);
0442     udelay(100);
0443     ak4531->write(ak4531, AK4531_CLOCK, 0x00);
0444     /* restore mixer registers */
0445     for (idx = 0; idx <= 0x19; idx++) {
0446         if (idx == AK4531_RESET || idx == AK4531_CLOCK)
0447             continue;
0448         ak4531->write(ak4531, idx, ak4531->regs[idx]);
0449     }
0450 }
0451 #endif
0452
0453 /*
0454  * /proc interface
0455  */
0456
0457 static void snd_ak4531_proc_read(struct snd_info_entry *entry,
0458                  struct snd_info_buffer *buffer)
0459 {
0460     struct snd_ak4531 *ak4531 = entry->private_data;
0461
0462     snd_iprintf(buffer, "Asahi Kasei AK4531\n\n");
0463     snd_iprintf(buffer, "Recording source   : %s\n"
0464             "MIC gain           : %s\n",
0465             ak4531->regs[AK4531_AD_IN] & 1 ? "external" : "mixer",
0466             ak4531->regs[AK4531_MIC_GAIN] & 1 ? "+30dB" : "+0dB");
0467 }
0468
0469 static void
0470 snd_ak4531_proc_init(struct snd_card *card, struct snd_ak4531 *ak4531)
0471 {
0472     snd_card_ro_proc_new(card, "ak4531", ak4531, snd_ak4531_proc_read);
0473 }