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TOMOYO Linux Cross Reference
Linux/sound/pci/ak4531_codec.c

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  1 /*
  2  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
  3  *  Universal routines for AK4531 codec
  4  *
  5  *
  6  *   This program is free software; you can redistribute it and/or modify
  7  *   it under the terms of the GNU General Public License as published by
  8  *   the Free Software Foundation; either version 2 of the License, or
  9  *   (at your option) any later version.
 10  *
 11  *   This program is distributed in the hope that it will be useful,
 12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 14  *   GNU General Public License for more details.
 15  *
 16  *   You should have received a copy of the GNU General Public License
 17  *   along with this program; if not, write to the Free Software
 18  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 19  *
 20  */
 21 
 22 #include <linux/delay.h>
 23 #include <linux/init.h>
 24 #include <linux/slab.h>
 25 #include <linux/mutex.h>
 26 
 27 #include <sound/core.h>
 28 #include <sound/ak4531_codec.h>
 29 #include <sound/tlv.h>
 30 
 31 /*
 32 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
 33 MODULE_DESCRIPTION("Universal routines for AK4531 codec");
 34 MODULE_LICENSE("GPL");
 35 */
 36 
 37 #ifdef CONFIG_PROC_FS
 38 static void snd_ak4531_proc_init(struct snd_card *card, struct snd_ak4531 *ak4531);
 39 #else
 40 #define snd_ak4531_proc_init(card,ak)
 41 #endif
 42 
 43 /*
 44  *
 45  */
 46  
 47 #if 0
 48 
 49 static void snd_ak4531_dump(struct snd_ak4531 *ak4531)
 50 {
 51         int idx;
 52         
 53         for (idx = 0; idx < 0x19; idx++)
 54                 printk(KERN_DEBUG "ak4531 0x%x: 0x%x\n",
 55                        idx, ak4531->regs[idx]);
 56 }
 57 
 58 #endif
 59 
 60 /*
 61  *
 62  */
 63 
 64 #define AK4531_SINGLE(xname, xindex, reg, shift, mask, invert) \
 65 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
 66   .info = snd_ak4531_info_single, \
 67   .get = snd_ak4531_get_single, .put = snd_ak4531_put_single, \
 68   .private_value = reg | (shift << 16) | (mask << 24) | (invert << 22) }
 69 #define AK4531_SINGLE_TLV(xname, xindex, reg, shift, mask, invert, xtlv)    \
 70 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
 71   .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ, \
 72   .name = xname, .index = xindex, \
 73   .info = snd_ak4531_info_single, \
 74   .get = snd_ak4531_get_single, .put = snd_ak4531_put_single, \
 75   .private_value = reg | (shift << 16) | (mask << 24) | (invert << 22), \
 76   .tlv = { .p = (xtlv) } }
 77 
 78 static int snd_ak4531_info_single(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 79 {
 80         int mask = (kcontrol->private_value >> 24) & 0xff;
 81 
 82         uinfo->type = mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
 83         uinfo->count = 1;
 84         uinfo->value.integer.min = 0;
 85         uinfo->value.integer.max = mask;
 86         return 0;
 87 }
 88  
 89 static int snd_ak4531_get_single(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
 90 {
 91         struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol);
 92         int reg = kcontrol->private_value & 0xff;
 93         int shift = (kcontrol->private_value >> 16) & 0x07;
 94         int mask = (kcontrol->private_value >> 24) & 0xff;
 95         int invert = (kcontrol->private_value >> 22) & 1;
 96         int val;
 97 
 98         mutex_lock(&ak4531->reg_mutex);
 99         val = (ak4531->regs[reg] >> shift) & mask;
100         mutex_unlock(&ak4531->reg_mutex);
101         if (invert) {
102                 val = mask - val;
103         }
104         ucontrol->value.integer.value[0] = val;
105         return 0;
106 }
107 
108 static int snd_ak4531_put_single(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
109 {
110         struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol);
111         int reg = kcontrol->private_value & 0xff;
112         int shift = (kcontrol->private_value >> 16) & 0x07;
113         int mask = (kcontrol->private_value >> 24) & 0xff;
114         int invert = (kcontrol->private_value >> 22) & 1;
115         int change;
116         int val;
117 
118         val = ucontrol->value.integer.value[0] & mask;
119         if (invert) {
120                 val = mask - val;
121         }
122         val <<= shift;
123         mutex_lock(&ak4531->reg_mutex);
124         val = (ak4531->regs[reg] & ~(mask << shift)) | val;
125         change = val != ak4531->regs[reg];
126         ak4531->write(ak4531, reg, ak4531->regs[reg] = val);
127         mutex_unlock(&ak4531->reg_mutex);
128         return change;
129 }
130 
131 #define AK4531_DOUBLE(xname, xindex, left_reg, right_reg, left_shift, right_shift, mask, invert) \
132 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
133   .info = snd_ak4531_info_double, \
134   .get = snd_ak4531_get_double, .put = snd_ak4531_put_double, \
135   .private_value = left_reg | (right_reg << 8) | (left_shift << 16) | (right_shift << 19) | (mask << 24) | (invert << 22) }
136 #define AK4531_DOUBLE_TLV(xname, xindex, left_reg, right_reg, left_shift, right_shift, mask, invert, xtlv) \
137 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
138   .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ, \
139   .name = xname, .index = xindex, \
140   .info = snd_ak4531_info_double, \
141   .get = snd_ak4531_get_double, .put = snd_ak4531_put_double, \
142   .private_value = left_reg | (right_reg << 8) | (left_shift << 16) | (right_shift << 19) | (mask << 24) | (invert << 22), \
143   .tlv = { .p = (xtlv) } }
144 
145 static int snd_ak4531_info_double(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
146 {
147         int mask = (kcontrol->private_value >> 24) & 0xff;
148 
149         uinfo->type = mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
150         uinfo->count = 2;
151         uinfo->value.integer.min = 0;
152         uinfo->value.integer.max = mask;
153         return 0;
154 }
155  
156 static int snd_ak4531_get_double(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
157 {
158         struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol);
159         int left_reg = kcontrol->private_value & 0xff;
160         int right_reg = (kcontrol->private_value >> 8) & 0xff;
161         int left_shift = (kcontrol->private_value >> 16) & 0x07;
162         int right_shift = (kcontrol->private_value >> 19) & 0x07;
163         int mask = (kcontrol->private_value >> 24) & 0xff;
164         int invert = (kcontrol->private_value >> 22) & 1;
165         int left, right;
166 
167         mutex_lock(&ak4531->reg_mutex);
168         left = (ak4531->regs[left_reg] >> left_shift) & mask;
169         right = (ak4531->regs[right_reg] >> right_shift) & mask;
170         mutex_unlock(&ak4531->reg_mutex);
171         if (invert) {
172                 left = mask - left;
173                 right = mask - right;
174         }
175         ucontrol->value.integer.value[0] = left;
176         ucontrol->value.integer.value[1] = right;
177         return 0;
178 }
179 
180 static int snd_ak4531_put_double(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
181 {
182         struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol);
183         int left_reg = kcontrol->private_value & 0xff;
184         int right_reg = (kcontrol->private_value >> 8) & 0xff;
185         int left_shift = (kcontrol->private_value >> 16) & 0x07;
186         int right_shift = (kcontrol->private_value >> 19) & 0x07;
187         int mask = (kcontrol->private_value >> 24) & 0xff;
188         int invert = (kcontrol->private_value >> 22) & 1;
189         int change;
190         int left, right;
191 
192         left = ucontrol->value.integer.value[0] & mask;
193         right = ucontrol->value.integer.value[1] & mask;
194         if (invert) {
195                 left = mask - left;
196                 right = mask - right;
197         }
198         left <<= left_shift;
199         right <<= right_shift;
200         mutex_lock(&ak4531->reg_mutex);
201         if (left_reg == right_reg) {
202                 left = (ak4531->regs[left_reg] & ~((mask << left_shift) | (mask << right_shift))) | left | right;
203                 change = left != ak4531->regs[left_reg];
204                 ak4531->write(ak4531, left_reg, ak4531->regs[left_reg] = left);
205         } else {
206                 left = (ak4531->regs[left_reg] & ~(mask << left_shift)) | left;
207                 right = (ak4531->regs[right_reg] & ~(mask << right_shift)) | right;
208                 change = left != ak4531->regs[left_reg] || right != ak4531->regs[right_reg];
209                 ak4531->write(ak4531, left_reg, ak4531->regs[left_reg] = left);
210                 ak4531->write(ak4531, right_reg, ak4531->regs[right_reg] = right);
211         }
212         mutex_unlock(&ak4531->reg_mutex);
213         return change;
214 }
215 
216 #define AK4531_INPUT_SW(xname, xindex, reg1, reg2, left_shift, right_shift) \
217 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
218   .info = snd_ak4531_info_input_sw, \
219   .get = snd_ak4531_get_input_sw, .put = snd_ak4531_put_input_sw, \
220   .private_value = reg1 | (reg2 << 8) | (left_shift << 16) | (right_shift << 24) }
221 
222 static int snd_ak4531_info_input_sw(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
223 {
224         uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
225         uinfo->count = 4;
226         uinfo->value.integer.min = 0;
227         uinfo->value.integer.max = 1;
228         return 0;
229 }
230  
231 static int snd_ak4531_get_input_sw(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
232 {
233         struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol);
234         int reg1 = kcontrol->private_value & 0xff;
235         int reg2 = (kcontrol->private_value >> 8) & 0xff;
236         int left_shift = (kcontrol->private_value >> 16) & 0x0f;
237         int right_shift = (kcontrol->private_value >> 24) & 0x0f;
238 
239         mutex_lock(&ak4531->reg_mutex);
240         ucontrol->value.integer.value[0] = (ak4531->regs[reg1] >> left_shift) & 1;
241         ucontrol->value.integer.value[1] = (ak4531->regs[reg2] >> left_shift) & 1;
242         ucontrol->value.integer.value[2] = (ak4531->regs[reg1] >> right_shift) & 1;
243         ucontrol->value.integer.value[3] = (ak4531->regs[reg2] >> right_shift) & 1;
244         mutex_unlock(&ak4531->reg_mutex);
245         return 0;
246 }
247 
248 static int snd_ak4531_put_input_sw(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
249 {
250         struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol);
251         int reg1 = kcontrol->private_value & 0xff;
252         int reg2 = (kcontrol->private_value >> 8) & 0xff;
253         int left_shift = (kcontrol->private_value >> 16) & 0x0f;
254         int right_shift = (kcontrol->private_value >> 24) & 0x0f;
255         int change;
256         int val1, val2;
257 
258         mutex_lock(&ak4531->reg_mutex);
259         val1 = ak4531->regs[reg1] & ~((1 << left_shift) | (1 << right_shift));
260         val2 = ak4531->regs[reg2] & ~((1 << left_shift) | (1 << right_shift));
261         val1 |= (ucontrol->value.integer.value[0] & 1) << left_shift;
262         val2 |= (ucontrol->value.integer.value[1] & 1) << left_shift;
263         val1 |= (ucontrol->value.integer.value[2] & 1) << right_shift;
264         val2 |= (ucontrol->value.integer.value[3] & 1) << right_shift;
265         change = val1 != ak4531->regs[reg1] || val2 != ak4531->regs[reg2];
266         ak4531->write(ak4531, reg1, ak4531->regs[reg1] = val1);
267         ak4531->write(ak4531, reg2, ak4531->regs[reg2] = val2);
268         mutex_unlock(&ak4531->reg_mutex);
269         return change;
270 }
271 
272 static const DECLARE_TLV_DB_SCALE(db_scale_master, -6200, 200, 0);
273 static const DECLARE_TLV_DB_SCALE(db_scale_mono, -2800, 400, 0);
274 static const DECLARE_TLV_DB_SCALE(db_scale_input, -5000, 200, 0);
275 
276 static struct snd_kcontrol_new snd_ak4531_controls[] __devinitdata = {
277 
278 AK4531_DOUBLE_TLV("Master Playback Switch", 0,
279                   AK4531_LMASTER, AK4531_RMASTER, 7, 7, 1, 1,
280                   db_scale_master),
281 AK4531_DOUBLE("Master Playback Volume", 0, AK4531_LMASTER, AK4531_RMASTER, 0, 0, 0x1f, 1),
282 
283 AK4531_SINGLE_TLV("Master Mono Playback Switch", 0, AK4531_MONO_OUT, 7, 1, 1,
284                   db_scale_mono),
285 AK4531_SINGLE("Master Mono Playback Volume", 0, AK4531_MONO_OUT, 0, 0x07, 1),
286 
287 AK4531_DOUBLE("PCM Switch", 0, AK4531_LVOICE, AK4531_RVOICE, 7, 7, 1, 1),
288 AK4531_DOUBLE_TLV("PCM Volume", 0, AK4531_LVOICE, AK4531_RVOICE, 0, 0, 0x1f, 1,
289                   db_scale_input),
290 AK4531_DOUBLE("PCM Playback Switch", 0, AK4531_OUT_SW2, AK4531_OUT_SW2, 3, 2, 1, 0),
291 AK4531_DOUBLE("PCM Capture Switch", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 2, 2, 1, 0),
292 
293 AK4531_DOUBLE("PCM Switch", 1, AK4531_LFM, AK4531_RFM, 7, 7, 1, 1),
294 AK4531_DOUBLE_TLV("PCM Volume", 1, AK4531_LFM, AK4531_RFM, 0, 0, 0x1f, 1,
295                   db_scale_input),
296 AK4531_DOUBLE("PCM Playback Switch", 1, AK4531_OUT_SW1, AK4531_OUT_SW1, 6, 5, 1, 0),
297 AK4531_INPUT_SW("PCM Capture Route", 1, AK4531_LIN_SW1, AK4531_RIN_SW1, 6, 5),
298 
299 AK4531_DOUBLE("CD Switch", 0, AK4531_LCD, AK4531_RCD, 7, 7, 1, 1),
300 AK4531_DOUBLE_TLV("CD Volume", 0, AK4531_LCD, AK4531_RCD, 0, 0, 0x1f, 1,
301                   db_scale_input),
302 AK4531_DOUBLE("CD Playback Switch", 0, AK4531_OUT_SW1, AK4531_OUT_SW1, 2, 1, 1, 0),
303 AK4531_INPUT_SW("CD Capture Route", 0, AK4531_LIN_SW1, AK4531_RIN_SW1, 2, 1),
304 
305 AK4531_DOUBLE("Line Switch", 0, AK4531_LLINE, AK4531_RLINE, 7, 7, 1, 1),
306 AK4531_DOUBLE_TLV("Line Volume", 0, AK4531_LLINE, AK4531_RLINE, 0, 0, 0x1f, 1,
307                   db_scale_input),
308 AK4531_DOUBLE("Line Playback Switch", 0, AK4531_OUT_SW1, AK4531_OUT_SW1, 4, 3, 1, 0),
309 AK4531_INPUT_SW("Line Capture Route", 0, AK4531_LIN_SW1, AK4531_RIN_SW1, 4, 3),
310 
311 AK4531_DOUBLE("Aux Switch", 0, AK4531_LAUXA, AK4531_RAUXA, 7, 7, 1, 1),
312 AK4531_DOUBLE_TLV("Aux Volume", 0, AK4531_LAUXA, AK4531_RAUXA, 0, 0, 0x1f, 1,
313                   db_scale_input),
314 AK4531_DOUBLE("Aux Playback Switch", 0, AK4531_OUT_SW2, AK4531_OUT_SW2, 5, 4, 1, 0),
315 AK4531_INPUT_SW("Aux Capture Route", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 4, 3),
316 
317 AK4531_SINGLE("Mono Switch", 0, AK4531_MONO1, 7, 1, 1),
318 AK4531_SINGLE_TLV("Mono Volume", 0, AK4531_MONO1, 0, 0x1f, 1, db_scale_input),
319 AK4531_SINGLE("Mono Playback Switch", 0, AK4531_OUT_SW2, 0, 1, 0),
320 AK4531_DOUBLE("Mono Capture Switch", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 0, 0, 1, 0),
321 
322 AK4531_SINGLE("Mono Switch", 1, AK4531_MONO2, 7, 1, 1),
323 AK4531_SINGLE_TLV("Mono Volume", 1, AK4531_MONO2, 0, 0x1f, 1, db_scale_input),
324 AK4531_SINGLE("Mono Playback Switch", 1, AK4531_OUT_SW2, 1, 1, 0),
325 AK4531_DOUBLE("Mono Capture Switch", 1, AK4531_LIN_SW2, AK4531_RIN_SW2, 1, 1, 1, 0),
326 
327 AK4531_SINGLE_TLV("Mic Volume", 0, AK4531_MIC, 0, 0x1f, 1, db_scale_input),
328 AK4531_SINGLE("Mic Switch", 0, AK4531_MIC, 7, 1, 1),
329 AK4531_SINGLE("Mic Playback Switch", 0, AK4531_OUT_SW1, 0, 1, 0),
330 AK4531_DOUBLE("Mic Capture Switch", 0, AK4531_LIN_SW1, AK4531_RIN_SW1, 0, 0, 1, 0),
331 
332 AK4531_DOUBLE("Mic Bypass Capture Switch", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 7, 7, 1, 0),
333 AK4531_DOUBLE("Mono1 Bypass Capture Switch", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 6, 6, 1, 0),
334 AK4531_DOUBLE("Mono2 Bypass Capture Switch", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 5, 5, 1, 0),
335 
336 AK4531_SINGLE("AD Input Select", 0, AK4531_AD_IN, 0, 1, 0),
337 AK4531_SINGLE("Mic Boost (+30dB)", 0, AK4531_MIC_GAIN, 0, 1, 0)
338 };
339 
340 static int snd_ak4531_free(struct snd_ak4531 *ak4531)
341 {
342         if (ak4531) {
343                 if (ak4531->private_free)
344                         ak4531->private_free(ak4531);
345                 kfree(ak4531);
346         }
347         return 0;
348 }
349 
350 static int snd_ak4531_dev_free(struct snd_device *device)
351 {
352         struct snd_ak4531 *ak4531 = device->device_data;
353         return snd_ak4531_free(ak4531);
354 }
355 
356 static u8 snd_ak4531_initial_map[0x19 + 1] = {
357         0x9f,           /* 00: Master Volume Lch */
358         0x9f,           /* 01: Master Volume Rch */
359         0x9f,           /* 02: Voice Volume Lch */
360         0x9f,           /* 03: Voice Volume Rch */
361         0x9f,           /* 04: FM Volume Lch */
362         0x9f,           /* 05: FM Volume Rch */
363         0x9f,           /* 06: CD Audio Volume Lch */
364         0x9f,           /* 07: CD Audio Volume Rch */
365         0x9f,           /* 08: Line Volume Lch */
366         0x9f,           /* 09: Line Volume Rch */
367         0x9f,           /* 0a: Aux Volume Lch */
368         0x9f,           /* 0b: Aux Volume Rch */
369         0x9f,           /* 0c: Mono1 Volume */
370         0x9f,           /* 0d: Mono2 Volume */
371         0x9f,           /* 0e: Mic Volume */
372         0x87,           /* 0f: Mono-out Volume */
373         0x00,           /* 10: Output Mixer SW1 */
374         0x00,           /* 11: Output Mixer SW2 */
375         0x00,           /* 12: Lch Input Mixer SW1 */
376         0x00,           /* 13: Rch Input Mixer SW1 */
377         0x00,           /* 14: Lch Input Mixer SW2 */
378         0x00,           /* 15: Rch Input Mixer SW2 */
379         0x00,           /* 16: Reset & Power Down */
380         0x00,           /* 17: Clock Select */
381         0x00,           /* 18: AD Input Select */
382         0x01            /* 19: Mic Amp Setup */
383 };
384 
385 int __devinit snd_ak4531_mixer(struct snd_card *card,
386                                struct snd_ak4531 *_ak4531,
387                                struct snd_ak4531 **rak4531)
388 {
389         unsigned int idx;
390         int err;
391         struct snd_ak4531 *ak4531;
392         static struct snd_device_ops ops = {
393                 .dev_free =     snd_ak4531_dev_free,
394         };
395 
396         if (snd_BUG_ON(!card || !_ak4531))
397                 return -EINVAL;
398         if (rak4531)
399                 *rak4531 = NULL;
400         ak4531 = kzalloc(sizeof(*ak4531), GFP_KERNEL);
401         if (ak4531 == NULL)
402                 return -ENOMEM;
403         *ak4531 = *_ak4531;
404         mutex_init(&ak4531->reg_mutex);
405         if ((err = snd_component_add(card, "AK4531")) < 0) {
406                 snd_ak4531_free(ak4531);
407                 return err;
408         }
409         strcpy(card->mixername, "Asahi Kasei AK4531");
410         ak4531->write(ak4531, AK4531_RESET, 0x03);      /* no RST, PD */
411         udelay(100);
412         ak4531->write(ak4531, AK4531_CLOCK, 0x00);      /* CODEC ADC and CODEC DAC use {LR,B}CLK2 and run off LRCLK2 PLL */
413         for (idx = 0; idx <= 0x19; idx++) {
414                 if (idx == AK4531_RESET || idx == AK4531_CLOCK)
415                         continue;
416                 ak4531->write(ak4531, idx, ak4531->regs[idx] = snd_ak4531_initial_map[idx]);    /* recording source is mixer */
417         }
418         for (idx = 0; idx < ARRAY_SIZE(snd_ak4531_controls); idx++) {
419                 if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_ak4531_controls[idx], ak4531))) < 0) {
420                         snd_ak4531_free(ak4531);
421                         return err;
422                 }
423         }
424         snd_ak4531_proc_init(card, ak4531);
425         if ((err = snd_device_new(card, SNDRV_DEV_CODEC, ak4531, &ops)) < 0) {
426                 snd_ak4531_free(ak4531);
427                 return err;
428         }
429 
430 #if 0
431         snd_ak4531_dump(ak4531);
432 #endif
433         if (rak4531)
434                 *rak4531 = ak4531;
435         return 0;
436 }
437 
438 /*
439  * power management
440  */
441 #ifdef CONFIG_PM
442 void snd_ak4531_suspend(struct snd_ak4531 *ak4531)
443 {
444         /* mute */
445         ak4531->write(ak4531, AK4531_LMASTER, 0x9f);
446         ak4531->write(ak4531, AK4531_RMASTER, 0x9f);
447         /* powerdown */
448         ak4531->write(ak4531, AK4531_RESET, 0x01);
449 }
450 
451 void snd_ak4531_resume(struct snd_ak4531 *ak4531)
452 {
453         int idx;
454 
455         /* initialize */
456         ak4531->write(ak4531, AK4531_RESET, 0x03);
457         udelay(100);
458         ak4531->write(ak4531, AK4531_CLOCK, 0x00);
459         /* restore mixer registers */
460         for (idx = 0; idx <= 0x19; idx++) {
461                 if (idx == AK4531_RESET || idx == AK4531_CLOCK)
462                         continue;
463                 ak4531->write(ak4531, idx, ak4531->regs[idx]);
464         }
465 }
466 #endif
467 
468 #ifdef CONFIG_PROC_FS
469 /*
470  * /proc interface
471  */
472 
473 static void snd_ak4531_proc_read(struct snd_info_entry *entry, 
474                                  struct snd_info_buffer *buffer)
475 {
476         struct snd_ak4531 *ak4531 = entry->private_data;
477 
478         snd_iprintf(buffer, "Asahi Kasei AK4531\n\n");
479         snd_iprintf(buffer, "Recording source   : %s\n"
480                     "MIC gain           : %s\n",
481                     ak4531->regs[AK4531_AD_IN] & 1 ? "external" : "mixer",
482                     ak4531->regs[AK4531_MIC_GAIN] & 1 ? "+30dB" : "+0dB");
483 }
484 
485 static void __devinit
486 snd_ak4531_proc_init(struct snd_card *card, struct snd_ak4531 *ak4531)
487 {
488         struct snd_info_entry *entry;
489 
490         if (! snd_card_proc_new(card, "ak4531", &entry))
491                 snd_info_set_text_ops(entry, ak4531, snd_ak4531_proc_read);
492 }
493 #endif
494 

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