sound/pci/ac97/ac97_proc.c - linux - Git at Google

 /*
  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
  *  Universal interface for Audio Codec '97
  *
  *  For more details look to AC '97 component specification revision 2.2
  *  by Intel Corporation (http://developer.intel.com).
  *
  *
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
  *   the Free Software Foundation; either version 2 of the License, or
  *   (at your option) any later version.
  *
  *   This program is distributed in the hope that it will be useful,
  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *   GNU General Public License for more details.
  *
  *   You should have received a copy of the GNU General Public License
  *   along with this program; if not, write to the Free Software
  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  *
  */

 #include <linux/slab.h>
 #include <linux/mutex.h>

 #include <sound/core.h>
 #include <sound/ac97_codec.h>
 #include <sound/asoundef.h>
 #include "ac97_local.h"
 #include "ac97_id.h"

 /*
  * proc interface
  */

 static void snd_ac97_proc_read_functions(struct snd_ac97 *ac97, struct snd_info_buffer *buffer)
 {
 	int header = 0, function;
 	unsigned short info, sense_info;
 	static const char *function_names[12] = {
 		"Master Out", "AUX Out", "Center/LFE Out", "SPDIF Out",
 		"Phone In", "Mic 1", "Mic 2", "Line In", "CD In", "Video In",
 		"Aux In", "Mono Out"
 	};
 	static const char *locations[8] = {
 		"Rear I/O Panel", "Front Panel", "Motherboard", "Dock/External",
 		"reserved", "reserved", "reserved", "NC/unused"
 	};

 	for (function = 0; function < 12; ++function) {
 		snd_ac97_write(ac97, AC97_FUNC_SELECT, function << 1);
 		info = snd_ac97_read(ac97, AC97_FUNC_INFO);
 		if (!(info & 0x0001))
 			continue;
 		if (!header) {
 			snd_iprintf(buffer, "\n                    Gain     Inverted  Buffer delay  Location\n");
 			header = 1;
 		}
 		sense_info = snd_ac97_read(ac97, AC97_SENSE_INFO);
 		snd_iprintf(buffer, "%-17s: %3d.%d dBV    %c      %2d/fs         %s\n",
 			    function_names[function],
 			    (info & 0x8000 ? -1 : 1) * ((info & 0x7000) >> 12) * 3 / 2,
 			    ((info & 0x0800) >> 11) * 5,
 			    info & 0x0400 ? 'X' : '-',
 			    (info & 0x03e0) >> 5,
 			    locations[sense_info >> 13]);
 	}
 }

 static const char *snd_ac97_stereo_enhancements[] =
 {
   /*   0 */ "No 3D Stereo Enhancement",
   /*   1 */ "Analog Devices Phat Stereo",
   /*   2 */ "Creative Stereo Enhancement",
   /*   3 */ "National Semi 3D Stereo Enhancement",
   /*   4 */ "YAMAHA Ymersion",
   /*   5 */ "BBE 3D Stereo Enhancement",
   /*   6 */ "Crystal Semi 3D Stereo Enhancement",
   /*   7 */ "Qsound QXpander",
   /*   8 */ "Spatializer 3D Stereo Enhancement",
   /*   9 */ "SRS 3D Stereo Enhancement",
   /*  10 */ "Platform Tech 3D Stereo Enhancement",
   /*  11 */ "AKM 3D Audio",
   /*  12 */ "Aureal Stereo Enhancement",
   /*  13 */ "Aztech 3D Enhancement",
   /*  14 */ "Binaura 3D Audio Enhancement",
   /*  15 */ "ESS Technology Stereo Enhancement",
   /*  16 */ "Harman International VMAx",
   /*  17 */ "Nvidea/IC Ensemble/KS Waves 3D Stereo Enhancement",
   /*  18 */ "Philips Incredible Sound",
   /*  19 */ "Texas Instruments 3D Stereo Enhancement",
   /*  20 */ "VLSI Technology 3D Stereo Enhancement",
   /*  21 */ "TriTech 3D Stereo Enhancement",
   /*  22 */ "Realtek 3D Stereo Enhancement",
   /*  23 */ "Samsung 3D Stereo Enhancement",
   /*  24 */ "Wolfson Microelectronics 3D Enhancement",
   /*  25 */ "Delta Integration 3D Enhancement",
   /*  26 */ "SigmaTel 3D Enhancement",
   /*  27 */ "IC Ensemble/KS Waves",
   /*  28 */ "Rockwell 3D Stereo Enhancement",
   /*  29 */ "Reserved 29",
   /*  30 */ "Reserved 30",
   /*  31 */ "Reserved 31"
 };

 static void snd_ac97_proc_read_main(struct snd_ac97 *ac97, struct snd_info_buffer *buffer, int subidx)
 {
 	char name[64];
 	unsigned short val, tmp, ext, mext;
 	static const char *spdif_slots[4] = { " SPDIF=3/4", " SPDIF=7/8", " SPDIF=6/9", " SPDIF=10/11" };
 	static const char *spdif_rates[4] = { " Rate=44.1kHz", " Rate=res", " Rate=48kHz", " Rate=32kHz" };
 	static const char *spdif_rates_cs4205[4] = { " Rate=48kHz", " Rate=44.1kHz", " Rate=res", " Rate=res" };
 	static const char *double_rate_slots[4] = { "10/11", "7/8", "reserved", "reserved" };

 	snd_ac97_get_name(NULL, ac97->id, name, 0);
 	snd_iprintf(buffer, "%d-%d/%d: %s\n\n", ac97->addr, ac97->num, subidx, name);

 	if ((ac97->scaps & AC97_SCAP_AUDIO) == 0)
 		goto __modem;

         snd_iprintf(buffer, "PCI Subsys Vendor: 0x%04x\n",
 	            ac97->subsystem_vendor);
         snd_iprintf(buffer, "PCI Subsys Device: 0x%04x\n\n",
                     ac97->subsystem_device);

 	snd_iprintf(buffer, "Flags: %x\n", ac97->flags);

 	if ((ac97->ext_id & AC97_EI_REV_MASK) >= AC97_EI_REV_23) {
 		val = snd_ac97_read(ac97, AC97_INT_PAGING);
 		snd_ac97_update_bits(ac97, AC97_INT_PAGING,
 				     AC97_PAGE_MASK, AC97_PAGE_1);
 		tmp = snd_ac97_read(ac97, AC97_CODEC_CLASS_REV);
 		snd_iprintf(buffer, "Revision         : 0x%02x\n", tmp & 0xff);
 		snd_iprintf(buffer, "Compat. Class    : 0x%02x\n", (tmp >> 8) & 0x1f);
 		snd_iprintf(buffer, "Subsys. Vendor ID: 0x%04x\n",
 			    snd_ac97_read(ac97, AC97_PCI_SVID));
 		snd_iprintf(buffer, "Subsys. ID       : 0x%04x\n\n",
 			    snd_ac97_read(ac97, AC97_PCI_SID));
 		snd_ac97_update_bits(ac97, AC97_INT_PAGING,
 				     AC97_PAGE_MASK, val & AC97_PAGE_MASK);
 	}

 	// val = snd_ac97_read(ac97, AC97_RESET);
 	val = ac97->caps;
 	snd_iprintf(buffer, "Capabilities     :%s%s%s%s%s%s\n",
 	    	    val & AC97_BC_DEDICATED_MIC ? " -dedicated MIC PCM IN channel-" : "",
 		    val & AC97_BC_RESERVED1 ? " -reserved1-" : "",
 		    val & AC97_BC_BASS_TREBLE ? " -bass & treble-" : "",
 		    val & AC97_BC_SIM_STEREO ? " -simulated stereo-" : "",
 		    val & AC97_BC_HEADPHONE ? " -headphone out-" : "",
 		    val & AC97_BC_LOUDNESS ? " -loudness-" : "");
 	tmp = ac97->caps & AC97_BC_DAC_MASK;
 	snd_iprintf(buffer, "DAC resolution   : %s%s%s%s\n",
 		    tmp == AC97_BC_16BIT_DAC ? "16-bit" : "",
 		    tmp == AC97_BC_18BIT_DAC ? "18-bit" : "",
 		    tmp == AC97_BC_20BIT_DAC ? "20-bit" : "",
 		    tmp == AC97_BC_DAC_MASK ? "???" : "");
 	tmp = ac97->caps & AC97_BC_ADC_MASK;
 	snd_iprintf(buffer, "ADC resolution   : %s%s%s%s\n",
 		    tmp == AC97_BC_16BIT_ADC ? "16-bit" : "",
 		    tmp == AC97_BC_18BIT_ADC ? "18-bit" : "",
 		    tmp == AC97_BC_20BIT_ADC ? "20-bit" : "",
 		    tmp == AC97_BC_ADC_MASK ? "???" : "");
 	snd_iprintf(buffer, "3D enhancement   : %s\n",
 		snd_ac97_stereo_enhancements[(val >> 10) & 0x1f]);
 	snd_iprintf(buffer, "\nCurrent setup\n");
 	val = snd_ac97_read(ac97, AC97_MIC);
 	snd_iprintf(buffer, "Mic gain         : %s [%s]\n", val & 0x0040 ? "+20dB" : "+0dB", ac97->regs[AC97_MIC] & 0x0040 ? "+20dB" : "+0dB");
 	val = snd_ac97_read(ac97, AC97_GENERAL_PURPOSE);
 	snd_iprintf(buffer, "POP path         : %s 3D\n"
 		    "Sim. stereo      : %s\n"
 		    "3D enhancement   : %s\n"
 		    "Loudness         : %s\n"
 		    "Mono output      : %s\n"
 		    "Mic select       : %s\n"
 		    "ADC/DAC loopback : %s\n",
 		    val & 0x8000 ? "post" : "pre",
 		    val & 0x4000 ? "on" : "off",
 		    val & 0x2000 ? "on" : "off",
 		    val & 0x1000 ? "on" : "off",
 		    val & 0x0200 ? "Mic" : "MIX",
 		    val & 0x0100 ? "Mic2" : "Mic1",
 		    val & 0x0080 ? "on" : "off");
 	if (ac97->ext_id & AC97_EI_DRA)
 		snd_iprintf(buffer, "Double rate slots: %s\n",
 			    double_rate_slots[(val >> 10) & 3]);

 	ext = snd_ac97_read(ac97, AC97_EXTENDED_ID);
 	if (ext == 0)
 		goto __modem;

 	snd_iprintf(buffer, "Extended ID      : codec=%i rev=%i%s%s%s%s DSA=%i%s%s%s%s\n",
 			(ext & AC97_EI_ADDR_MASK) >> AC97_EI_ADDR_SHIFT,
 			(ext & AC97_EI_REV_MASK) >> AC97_EI_REV_SHIFT,
 			ext & AC97_EI_AMAP ? " AMAP" : "",
 			ext & AC97_EI_LDAC ? " LDAC" : "",
 			ext & AC97_EI_SDAC ? " SDAC" : "",
 			ext & AC97_EI_CDAC ? " CDAC" : "",
 			(ext & AC97_EI_DACS_SLOT_MASK) >> AC97_EI_DACS_SLOT_SHIFT,
 			ext & AC97_EI_VRM ? " VRM" : "",
 			ext & AC97_EI_SPDIF ? " SPDIF" : "",
 			ext & AC97_EI_DRA ? " DRA" : "",
 			ext & AC97_EI_VRA ? " VRA" : "");
 	val = snd_ac97_read(ac97, AC97_EXTENDED_STATUS);
 	snd_iprintf(buffer, "Extended status  :%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n",
 			val & AC97_EA_PRL ? " PRL" : "",
 			val & AC97_EA_PRK ? " PRK" : "",
 			val & AC97_EA_PRJ ? " PRJ" : "",
 			val & AC97_EA_PRI ? " PRI" : "",
 			val & AC97_EA_SPCV ? " SPCV" : "",
 			val & AC97_EA_MDAC ? " MADC" : "",
 			val & AC97_EA_LDAC ? " LDAC" : "",
 			val & AC97_EA_SDAC ? " SDAC" : "",
 			val & AC97_EA_CDAC ? " CDAC" : "",
 			ext & AC97_EI_SPDIF ? spdif_slots[(val & AC97_EA_SPSA_SLOT_MASK) >> AC97_EA_SPSA_SLOT_SHIFT] : "",
 			val & AC97_EA_VRM ? " VRM" : "",
 			val & AC97_EA_SPDIF ? " SPDIF" : "",
 			val & AC97_EA_DRA ? " DRA" : "",
 			val & AC97_EA_VRA ? " VRA" : "");
 	if (ext & AC97_EI_VRA) {	/* VRA */
 		val = snd_ac97_read(ac97, AC97_PCM_FRONT_DAC_RATE);
 		snd_iprintf(buffer, "PCM front DAC    : %iHz\n", val);
 		if (ext & AC97_EI_SDAC) {
 			val = snd_ac97_read(ac97, AC97_PCM_SURR_DAC_RATE);
 			snd_iprintf(buffer, "PCM Surr DAC     : %iHz\n", val);
 		}
 		if (ext & AC97_EI_LDAC) {
 			val = snd_ac97_read(ac97, AC97_PCM_LFE_DAC_RATE);
 			snd_iprintf(buffer, "PCM LFE DAC      : %iHz\n", val);
 		}
 		val = snd_ac97_read(ac97, AC97_PCM_LR_ADC_RATE);
 		snd_iprintf(buffer, "PCM ADC          : %iHz\n", val);
 	}
 	if (ext & AC97_EI_VRM) {
 		val = snd_ac97_read(ac97, AC97_PCM_MIC_ADC_RATE);
 		snd_iprintf(buffer, "PCM MIC ADC      : %iHz\n", val);
 	}
 	if ((ext & AC97_EI_SPDIF) || (ac97->flags & AC97_CS_SPDIF) ||
 	    (ac97->id == AC97_ID_YMF743)) {
 	        if (ac97->flags & AC97_CS_SPDIF)
 			val = snd_ac97_read(ac97, AC97_CSR_SPDIF);
 		else if (ac97->id == AC97_ID_YMF743) {
 			val = snd_ac97_read(ac97, AC97_YMF7X3_DIT_CTRL);
 			val = 0x2000 | (val & 0xff00) >> 4 | (val & 0x38) >> 2;
 		} else
 			val = snd_ac97_read(ac97, AC97_SPDIF);

 		snd_iprintf(buffer, "SPDIF Control    :%s%s%s%s Category=0x%x Generation=%i%s%s%s\n",
 			val & AC97_SC_PRO ? " PRO" : " Consumer",
 			val & AC97_SC_NAUDIO ? " Non-audio" : " PCM",
 			val & AC97_SC_COPY ? "" : " Copyright",
 			val & AC97_SC_PRE ? " Preemph50/15" : "",
 			(val & AC97_SC_CC_MASK) >> AC97_SC_CC_SHIFT,
 			(val & AC97_SC_L) >> 11,
 			(ac97->flags & AC97_CS_SPDIF) ?
 			    spdif_rates_cs4205[(val & AC97_SC_SPSR_MASK) >> AC97_SC_SPSR_SHIFT] :
 			    spdif_rates[(val & AC97_SC_SPSR_MASK) >> AC97_SC_SPSR_SHIFT],
 			(ac97->flags & AC97_CS_SPDIF) ?
 			    (val & AC97_SC_DRS ? " Validity" : "") :
 			    (val & AC97_SC_DRS ? " DRS" : ""),
 			(ac97->flags & AC97_CS_SPDIF) ?
 			    (val & AC97_SC_V ? " Enabled" : "") :
 			    (val & AC97_SC_V ? " Validity" : ""));
 		/* ALC650 specific*/
 		if ((ac97->id & 0xfffffff0) == 0x414c4720 &&
 		    (snd_ac97_read(ac97, AC97_ALC650_CLOCK) & 0x01)) {
 			val = snd_ac97_read(ac97, AC97_ALC650_SPDIF_INPUT_STATUS2);
 			if (val & AC97_ALC650_CLOCK_LOCK) {
 				val = snd_ac97_read(ac97, AC97_ALC650_SPDIF_INPUT_STATUS1);
 				snd_iprintf(buffer, "SPDIF In Status  :%s%s%s%s Category=0x%x Generation=%i",
 					    val & AC97_ALC650_PRO ? " PRO" : " Consumer",
 					    val & AC97_ALC650_NAUDIO ? " Non-audio" : " PCM",
 					    val & AC97_ALC650_COPY ? "" : " Copyright",
 					    val & AC97_ALC650_PRE ? " Preemph50/15" : "",
 					    (val & AC97_ALC650_CC_MASK) >> AC97_ALC650_CC_SHIFT,
 					    (val & AC97_ALC650_L) >> 15);
 				val = snd_ac97_read(ac97, AC97_ALC650_SPDIF_INPUT_STATUS2);
 				snd_iprintf(buffer, "%s Accuracy=%i%s%s\n",
 					    spdif_rates[(val & AC97_ALC650_SPSR_MASK) >> AC97_ALC650_SPSR_SHIFT],
 					    (val & AC97_ALC650_CLOCK_ACCURACY) >> AC97_ALC650_CLOCK_SHIFT,
 					    (val & AC97_ALC650_CLOCK_LOCK ? " Locked" : " Unlocked"),
 					    (val & AC97_ALC650_V ? " Validity?" : ""));
 			} else {
 				snd_iprintf(buffer, "SPDIF In Status  : Not Locked\n");
 			}
 		}
 	}
 	if ((ac97->ext_id & AC97_EI_REV_MASK) >= AC97_EI_REV_23) {
 		val = snd_ac97_read(ac97, AC97_INT_PAGING);
 		snd_ac97_update_bits(ac97, AC97_INT_PAGING,
 				     AC97_PAGE_MASK, AC97_PAGE_1);
 		snd_ac97_proc_read_functions(ac97, buffer);
 		snd_ac97_update_bits(ac97, AC97_INT_PAGING,
 				     AC97_PAGE_MASK, val & AC97_PAGE_MASK);
 	}


       __modem:
 	mext = snd_ac97_read(ac97, AC97_EXTENDED_MID);
 	if (mext == 0)
 		return;

 	snd_iprintf(buffer, "Extended modem ID: codec=%i%s%s%s%s%s\n",
 			(mext & AC97_MEI_ADDR_MASK) >> AC97_MEI_ADDR_SHIFT,
 			mext & AC97_MEI_CID2 ? " CID2" : "",
 			mext & AC97_MEI_CID1 ? " CID1" : "",
 			mext & AC97_MEI_HANDSET ? " HSET" : "",
 			mext & AC97_MEI_LINE2 ? " LIN2" : "",
 			mext & AC97_MEI_LINE1 ? " LIN1" : "");
 	val = snd_ac97_read(ac97, AC97_EXTENDED_MSTATUS);
 	snd_iprintf(buffer, "Modem status     :%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n",
 			val & AC97_MEA_GPIO ? " GPIO" : "",
 			val & AC97_MEA_MREF ? " MREF" : "",
 			val & AC97_MEA_ADC1 ? " ADC1" : "",
 			val & AC97_MEA_DAC1 ? " DAC1" : "",
 			val & AC97_MEA_ADC2 ? " ADC2" : "",
 			val & AC97_MEA_DAC2 ? " DAC2" : "",
 			val & AC97_MEA_HADC ? " HADC" : "",
 			val & AC97_MEA_HDAC ? " HDAC" : "",
 			val & AC97_MEA_PRA ? " PRA(GPIO)" : "",
 			val & AC97_MEA_PRB ? " PRB(res)" : "",
 			val & AC97_MEA_PRC ? " PRC(ADC1)" : "",
 			val & AC97_MEA_PRD ? " PRD(DAC1)" : "",
 			val & AC97_MEA_PRE ? " PRE(ADC2)" : "",
 			val & AC97_MEA_PRF ? " PRF(DAC2)" : "",
 			val & AC97_MEA_PRG ? " PRG(HADC)" : "",
 			val & AC97_MEA_PRH ? " PRH(HDAC)" : "");
 	if (mext & AC97_MEI_LINE1) {
 		val = snd_ac97_read(ac97, AC97_LINE1_RATE);
 		snd_iprintf(buffer, "Line1 rate       : %iHz\n", val);
 	}
 	if (mext & AC97_MEI_LINE2) {
 		val = snd_ac97_read(ac97, AC97_LINE2_RATE);
 		snd_iprintf(buffer, "Line2 rate       : %iHz\n", val);
 	}
 	if (mext & AC97_MEI_HANDSET) {
 		val = snd_ac97_read(ac97, AC97_HANDSET_RATE);
 		snd_iprintf(buffer, "Headset rate     : %iHz\n", val);
 	}
 }

 static void snd_ac97_proc_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
 {
 	struct snd_ac97 *ac97 = entry->private_data;

 	mutex_lock(&ac97->page_mutex);
 	if ((ac97->id & 0xffffff40) == AC97_ID_AD1881) {	// Analog Devices AD1881/85/86
 		int idx;
 		for (idx = 0; idx < 3; idx++)
 			if (ac97->spec.ad18xx.id[idx]) {
 				/* select single codec */
 				snd_ac97_update_bits(ac97, AC97_AD_SERIAL_CFG, 0x7000,
 						     ac97->spec.ad18xx.unchained[idx] | ac97->spec.ad18xx.chained[idx]);
 				snd_ac97_proc_read_main(ac97, buffer, idx);
 				snd_iprintf(buffer, "\n\n");
 			}
 		/* select all codecs */
 		snd_ac97_update_bits(ac97, AC97_AD_SERIAL_CFG, 0x7000, 0x7000);

 		snd_iprintf(buffer, "\nAD18XX configuration\n");
 		snd_iprintf(buffer, "Unchained        : 0x%04x,0x%04x,0x%04x\n",
 			ac97->spec.ad18xx.unchained[0],
 			ac97->spec.ad18xx.unchained[1],
 			ac97->spec.ad18xx.unchained[2]);
 		snd_iprintf(buffer, "Chained          : 0x%04x,0x%04x,0x%04x\n",
 			ac97->spec.ad18xx.chained[0],
 			ac97->spec.ad18xx.chained[1],
 			ac97->spec.ad18xx.chained[2]);
 	} else {
 		snd_ac97_proc_read_main(ac97, buffer, 0);
 	}
 	mutex_unlock(&ac97->page_mutex);
 }

 #ifdef CONFIG_SND_DEBUG
 /* direct register write for debugging */
 static void snd_ac97_proc_regs_write(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
 {
 	struct snd_ac97 *ac97 = entry->private_data;
 	char line[64];
 	unsigned int reg, val;
 	mutex_lock(&ac97->page_mutex);
 	while (!snd_info_get_line(buffer, line, sizeof(line))) {
 		if (sscanf(line, "%x %x", &reg, &val) != 2)
 			continue;
 		/* register must be even */
 		if (reg < 0x80 && (reg & 1) == 0 && val <= 0xffff)
 			snd_ac97_write_cache(ac97, reg, val);
 	}
 	mutex_unlock(&ac97->page_mutex);
 }
 #endif

 static void snd_ac97_proc_regs_read_main(struct snd_ac97 *ac97, struct snd_info_buffer *buffer, int subidx)
 {
 	int reg, val;

 	for (reg = 0; reg < 0x80; reg += 2) {
 		val = snd_ac97_read(ac97, reg);
 		snd_iprintf(buffer, "%i:%02x = %04x\n", subidx, reg, val);
 	}
 }

 static void snd_ac97_proc_regs_read(struct snd_info_entry *entry,
 				    struct snd_info_buffer *buffer)
 {
 	struct snd_ac97 *ac97 = entry->private_data;

 	mutex_lock(&ac97->page_mutex);
 	if ((ac97->id & 0xffffff40) == AC97_ID_AD1881) {	// Analog Devices AD1881/85/86

 		int idx;
 		for (idx = 0; idx < 3; idx++)
 			if (ac97->spec.ad18xx.id[idx]) {
 				/* select single codec */
 				snd_ac97_update_bits(ac97, AC97_AD_SERIAL_CFG, 0x7000,
 						     ac97->spec.ad18xx.unchained[idx] | ac97->spec.ad18xx.chained[idx]);
 				snd_ac97_proc_regs_read_main(ac97, buffer, idx);
 			}
 		/* select all codecs */
 		snd_ac97_update_bits(ac97, AC97_AD_SERIAL_CFG, 0x7000, 0x7000);
 	} else {
 		snd_ac97_proc_regs_read_main(ac97, buffer, 0);
 	}
 	mutex_unlock(&ac97->page_mutex);
 }

 void snd_ac97_proc_init(struct snd_ac97 * ac97)
 {
 	struct snd_info_entry *entry;
 	char name[32];
 	const char *prefix;

 	if (ac97->bus->proc == NULL)
 		return;
 	prefix = ac97_is_audio(ac97) ? "ac97" : "mc97";
 	sprintf(name, "%s#%d-%d", prefix, ac97->addr, ac97->num);
 	if ((entry = snd_info_create_card_entry(ac97->bus->card, name, ac97->bus->proc)) != NULL) {
 		snd_info_set_text_ops(entry, ac97, snd_ac97_proc_read);
 		if (snd_info_register(entry) < 0) {
 			snd_info_free_entry(entry);
 			entry = NULL;
 		}
 	}
 	ac97->proc = entry;
 	sprintf(name, "%s#%d-%d+regs", prefix, ac97->addr, ac97->num);
 	if ((entry = snd_info_create_card_entry(ac97->bus->card, name, ac97->bus->proc)) != NULL) {
 		snd_info_set_text_ops(entry, ac97, snd_ac97_proc_regs_read);
 #ifdef CONFIG_SND_DEBUG
 		entry->mode |= S_IWUSR;
 		entry->c.text.write = snd_ac97_proc_regs_write;
 #endif
 		if (snd_info_register(entry) < 0) {
 			snd_info_free_entry(entry);
 			entry = NULL;
 		}
 	}
 	ac97->proc_regs = entry;
 }

 void snd_ac97_proc_done(struct snd_ac97 * ac97)
 {
 	snd_info_free_entry(ac97->proc_regs);
 	ac97->proc_regs = NULL;
 	snd_info_free_entry(ac97->proc);
 	ac97->proc = NULL;
 }

 void snd_ac97_bus_proc_init(struct snd_ac97_bus * bus)
 {
 	struct snd_info_entry *entry;
 	char name[32];

 	sprintf(name, "codec97#%d", bus->num);
 	if ((entry = snd_info_create_card_entry(bus->card, name, bus->card->proc_root)) != NULL) {
 		entry->mode = S_IFDIR | S_IRUGO | S_IXUGO;
 		if (snd_info_register(entry) < 0) {
 			snd_info_free_entry(entry);
 			entry = NULL;
 		}
 	}
 	bus->proc = entry;
 }

 void snd_ac97_bus_proc_done(struct snd_ac97_bus * bus)
 {
 	snd_info_free_entry(bus->proc);
 	bus->proc = NULL;
 }
	/*
	* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
	* Universal interface for Audio Codec '97
	*
	* For more details look to AC '97 component specification revision 2.2
	* by Intel Corporation (http://developer.intel.com).
	*
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation; either version 2 of the License, or
	* (at your option) any later version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write to the Free Software
	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	*
	*/

	#include <linux/slab.h>
	#include <linux/mutex.h>

	#include <sound/core.h>
	#include <sound/ac97_codec.h>
	#include <sound/asoundef.h>
	#include "ac97_local.h"
	#include "ac97_id.h"

	/*
	* proc interface
	*/

	static void snd_ac97_proc_read_functions(struct snd_ac97 ac97, struct snd_info_buffer buffer)
	{
	int header = 0, function;
	unsigned short info, sense_info;
	static const char *function_names[12] = {
	"Master Out", "AUX Out", "Center/LFE Out", "SPDIF Out",
	"Phone In", "Mic 1", "Mic 2", "Line In", "CD In", "Video In",
	"Aux In", "Mono Out"
	};
	static const char *locations[8] = {
	"Rear I/O Panel", "Front Panel", "Motherboard", "Dock/External",
	"reserved", "reserved", "reserved", "NC/unused"
	};

	for (function = 0; function < 12; ++function) {
	snd_ac97_write(ac97, AC97_FUNC_SELECT, function << 1);
	info = snd_ac97_read(ac97, AC97_FUNC_INFO);
	if (!(info & 0x0001))
	continue;
	if (!header) {
	snd_iprintf(buffer, "\n Gain Inverted Buffer delay Location\n");
	header = 1;
	}
	sense_info = snd_ac97_read(ac97, AC97_SENSE_INFO);
	snd_iprintf(buffer, "%-17s: %3d.%d dBV %c %2d/fs %s\n",
	function_names[function],
	(info & 0x8000 ? -1 : 1) * ((info & 0x7000) >> 12) * 3 / 2,
	((info & 0x0800) >> 11) * 5,
	info & 0x0400 ? 'X' : '-',
	(info & 0x03e0) >> 5,
	locations[sense_info >> 13]);
	}
	}

	static const char *snd_ac97_stereo_enhancements[] =
	{
	/* 0 */ "No 3D Stereo Enhancement",
	/* 1 */ "Analog Devices Phat Stereo",
	/* 2 */ "Creative Stereo Enhancement",
	/* 3 */ "National Semi 3D Stereo Enhancement",
	/* 4 */ "YAMAHA Ymersion",
	/* 5 */ "BBE 3D Stereo Enhancement",
	/* 6 */ "Crystal Semi 3D Stereo Enhancement",
	/* 7 */ "Qsound QXpander",
	/* 8 */ "Spatializer 3D Stereo Enhancement",
	/* 9 */ "SRS 3D Stereo Enhancement",
	/* 10 */ "Platform Tech 3D Stereo Enhancement",
	/* 11 */ "AKM 3D Audio",
	/* 12 */ "Aureal Stereo Enhancement",
	/* 13 */ "Aztech 3D Enhancement",
	/* 14 */ "Binaura 3D Audio Enhancement",
	/* 15 */ "ESS Technology Stereo Enhancement",
	/* 16 */ "Harman International VMAx",
	/* 17 */ "Nvidea/IC Ensemble/KS Waves 3D Stereo Enhancement",
	/* 18 */ "Philips Incredible Sound",
	/* 19 */ "Texas Instruments 3D Stereo Enhancement",
	/* 20 */ "VLSI Technology 3D Stereo Enhancement",
	/* 21 */ "TriTech 3D Stereo Enhancement",
	/* 22 */ "Realtek 3D Stereo Enhancement",
	/* 23 */ "Samsung 3D Stereo Enhancement",
	/* 24 */ "Wolfson Microelectronics 3D Enhancement",
	/* 25 */ "Delta Integration 3D Enhancement",
	/* 26 */ "SigmaTel 3D Enhancement",
	/* 27 */ "IC Ensemble/KS Waves",
	/* 28 */ "Rockwell 3D Stereo Enhancement",
	/* 29 */ "Reserved 29",
	/* 30 */ "Reserved 30",
	/* 31 */ "Reserved 31"
	};

	static void snd_ac97_proc_read_main(struct snd_ac97 ac97, struct snd_info_buffer buffer, int subidx)
	{
	char name[64];
	unsigned short val, tmp, ext, mext;
	static const char *spdif_slots[4] = { " SPDIF=3/4", " SPDIF=7/8", " SPDIF=6/9", " SPDIF=10/11" };
	static const char *spdif_rates[4] = { " Rate=44.1kHz", " Rate=res", " Rate=48kHz", " Rate=32kHz" };
	static const char *spdif_rates_cs4205[4] = { " Rate=48kHz", " Rate=44.1kHz", " Rate=res", " Rate=res" };
	static const char *double_rate_slots[4] = { "10/11", "7/8", "reserved", "reserved" };

	snd_ac97_get_name(NULL, ac97->id, name, 0);
	snd_iprintf(buffer, "%d-%d/%d: %s\n\n", ac97->addr, ac97->num, subidx, name);

	if ((ac97->scaps & AC97_SCAP_AUDIO) == 0)
	goto __modem;

	snd_iprintf(buffer, "PCI Subsys Vendor: 0x%04x\n",
	ac97->subsystem_vendor);
	snd_iprintf(buffer, "PCI Subsys Device: 0x%04x\n\n",
	ac97->subsystem_device);

	snd_iprintf(buffer, "Flags: %x\n", ac97->flags);

	if ((ac97->ext_id & AC97_EI_REV_MASK) >= AC97_EI_REV_23) {
	val = snd_ac97_read(ac97, AC97_INT_PAGING);
	snd_ac97_update_bits(ac97, AC97_INT_PAGING,
	AC97_PAGE_MASK, AC97_PAGE_1);
	tmp = snd_ac97_read(ac97, AC97_CODEC_CLASS_REV);
	snd_iprintf(buffer, "Revision : 0x%02x\n", tmp & 0xff);
	snd_iprintf(buffer, "Compat. Class : 0x%02x\n", (tmp >> 8) & 0x1f);
	snd_iprintf(buffer, "Subsys. Vendor ID: 0x%04x\n",
	snd_ac97_read(ac97, AC97_PCI_SVID));
	snd_iprintf(buffer, "Subsys. ID : 0x%04x\n\n",
	snd_ac97_read(ac97, AC97_PCI_SID));
	snd_ac97_update_bits(ac97, AC97_INT_PAGING,
	AC97_PAGE_MASK, val & AC97_PAGE_MASK);
	}

	// val = snd_ac97_read(ac97, AC97_RESET);
	val = ac97->caps;
	snd_iprintf(buffer, "Capabilities :%s%s%s%s%s%s\n",
	val & AC97_BC_DEDICATED_MIC ? " -dedicated MIC PCM IN channel-" : "",
	val & AC97_BC_RESERVED1 ? " -reserved1-" : "",
	val & AC97_BC_BASS_TREBLE ? " -bass & treble-" : "",
	val & AC97_BC_SIM_STEREO ? " -simulated stereo-" : "",
	val & AC97_BC_HEADPHONE ? " -headphone out-" : "",
	val & AC97_BC_LOUDNESS ? " -loudness-" : "");
	tmp = ac97->caps & AC97_BC_DAC_MASK;
	snd_iprintf(buffer, "DAC resolution : %s%s%s%s\n",
	tmp == AC97_BC_16BIT_DAC ? "16-bit" : "",
	tmp == AC97_BC_18BIT_DAC ? "18-bit" : "",
	tmp == AC97_BC_20BIT_DAC ? "20-bit" : "",
	tmp == AC97_BC_DAC_MASK ? "???" : "");
	tmp = ac97->caps & AC97_BC_ADC_MASK;
	snd_iprintf(buffer, "ADC resolution : %s%s%s%s\n",
	tmp == AC97_BC_16BIT_ADC ? "16-bit" : "",
	tmp == AC97_BC_18BIT_ADC ? "18-bit" : "",
	tmp == AC97_BC_20BIT_ADC ? "20-bit" : "",
	tmp == AC97_BC_ADC_MASK ? "???" : "");
	snd_iprintf(buffer, "3D enhancement : %s\n",
	snd_ac97_stereo_enhancements[(val >> 10) & 0x1f]);
	snd_iprintf(buffer, "\nCurrent setup\n");
	val = snd_ac97_read(ac97, AC97_MIC);
	snd_iprintf(buffer, "Mic gain : %s [%s]\n", val & 0x0040 ? "+20dB" : "+0dB", ac97->regs[AC97_MIC] & 0x0040 ? "+20dB" : "+0dB");
	val = snd_ac97_read(ac97, AC97_GENERAL_PURPOSE);
	snd_iprintf(buffer, "POP path : %s 3D\n"
	"Sim. stereo : %s\n"
	"3D enhancement : %s\n"
	"Loudness : %s\n"
	"Mono output : %s\n"
	"Mic select : %s\n"
	"ADC/DAC loopback : %s\n",
	val & 0x8000 ? "post" : "pre",
	val & 0x4000 ? "on" : "off",
	val & 0x2000 ? "on" : "off",
	val & 0x1000 ? "on" : "off",
	val & 0x0200 ? "Mic" : "MIX",
	val & 0x0100 ? "Mic2" : "Mic1",
	val & 0x0080 ? "on" : "off");
	if (ac97->ext_id & AC97_EI_DRA)
	snd_iprintf(buffer, "Double rate slots: %s\n",
	double_rate_slots[(val >> 10) & 3]);

	ext = snd_ac97_read(ac97, AC97_EXTENDED_ID);
	if (ext == 0)
	goto __modem;

	snd_iprintf(buffer, "Extended ID : codec=%i rev=%i%s%s%s%s DSA=%i%s%s%s%s\n",
	(ext & AC97_EI_ADDR_MASK) >> AC97_EI_ADDR_SHIFT,
	(ext & AC97_EI_REV_MASK) >> AC97_EI_REV_SHIFT,
	ext & AC97_EI_AMAP ? " AMAP" : "",
	ext & AC97_EI_LDAC ? " LDAC" : "",
	ext & AC97_EI_SDAC ? " SDAC" : "",
	ext & AC97_EI_CDAC ? " CDAC" : "",
	(ext & AC97_EI_DACS_SLOT_MASK) >> AC97_EI_DACS_SLOT_SHIFT,
	ext & AC97_EI_VRM ? " VRM" : "",
	ext & AC97_EI_SPDIF ? " SPDIF" : "",
	ext & AC97_EI_DRA ? " DRA" : "",
	ext & AC97_EI_VRA ? " VRA" : "");
	val = snd_ac97_read(ac97, AC97_EXTENDED_STATUS);
	snd_iprintf(buffer, "Extended status :%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n",
	val & AC97_EA_PRL ? " PRL" : "",
	val & AC97_EA_PRK ? " PRK" : "",
	val & AC97_EA_PRJ ? " PRJ" : "",
	val & AC97_EA_PRI ? " PRI" : "",
	val & AC97_EA_SPCV ? " SPCV" : "",
	val & AC97_EA_MDAC ? " MADC" : "",
	val & AC97_EA_LDAC ? " LDAC" : "",
	val & AC97_EA_SDAC ? " SDAC" : "",
	val & AC97_EA_CDAC ? " CDAC" : "",
	ext & AC97_EI_SPDIF ? spdif_slots[(val & AC97_EA_SPSA_SLOT_MASK) >> AC97_EA_SPSA_SLOT_SHIFT] : "",
	val & AC97_EA_VRM ? " VRM" : "",
	val & AC97_EA_SPDIF ? " SPDIF" : "",
	val & AC97_EA_DRA ? " DRA" : "",
	val & AC97_EA_VRA ? " VRA" : "");
	if (ext & AC97_EI_VRA) { /* VRA */
	val = snd_ac97_read(ac97, AC97_PCM_FRONT_DAC_RATE);
	snd_iprintf(buffer, "PCM front DAC : %iHz\n", val);
	if (ext & AC97_EI_SDAC) {
	val = snd_ac97_read(ac97, AC97_PCM_SURR_DAC_RATE);
	snd_iprintf(buffer, "PCM Surr DAC : %iHz\n", val);
	}
	if (ext & AC97_EI_LDAC) {
	val = snd_ac97_read(ac97, AC97_PCM_LFE_DAC_RATE);
	snd_iprintf(buffer, "PCM LFE DAC : %iHz\n", val);
	}
	val = snd_ac97_read(ac97, AC97_PCM_LR_ADC_RATE);
	snd_iprintf(buffer, "PCM ADC : %iHz\n", val);
	}
	if (ext & AC97_EI_VRM) {
	val = snd_ac97_read(ac97, AC97_PCM_MIC_ADC_RATE);
	snd_iprintf(buffer, "PCM MIC ADC : %iHz\n", val);
	}
	if ((ext & AC97_EI_SPDIF) \|\| (ac97->flags & AC97_CS_SPDIF) \|\|
	(ac97->id == AC97_ID_YMF743)) {
	if (ac97->flags & AC97_CS_SPDIF)
	val = snd_ac97_read(ac97, AC97_CSR_SPDIF);
	else if (ac97->id == AC97_ID_YMF743) {
	val = snd_ac97_read(ac97, AC97_YMF7X3_DIT_CTRL);
	val = 0x2000 \| (val & 0xff00) >> 4 \| (val & 0x38) >> 2;
	} else
	val = snd_ac97_read(ac97, AC97_SPDIF);

	snd_iprintf(buffer, "SPDIF Control :%s%s%s%s Category=0x%x Generation=%i%s%s%s\n",
	val & AC97_SC_PRO ? " PRO" : " Consumer",
	val & AC97_SC_NAUDIO ? " Non-audio" : " PCM",
	val & AC97_SC_COPY ? "" : " Copyright",
	val & AC97_SC_PRE ? " Preemph50/15" : "",
	(val & AC97_SC_CC_MASK) >> AC97_SC_CC_SHIFT,
	(val & AC97_SC_L) >> 11,
	(ac97->flags & AC97_CS_SPDIF) ?
	spdif_rates_cs4205[(val & AC97_SC_SPSR_MASK) >> AC97_SC_SPSR_SHIFT] :
	spdif_rates[(val & AC97_SC_SPSR_MASK) >> AC97_SC_SPSR_SHIFT],
	(ac97->flags & AC97_CS_SPDIF) ?
	(val & AC97_SC_DRS ? " Validity" : "") :
	(val & AC97_SC_DRS ? " DRS" : ""),
	(ac97->flags & AC97_CS_SPDIF) ?
	(val & AC97_SC_V ? " Enabled" : "") :
	(val & AC97_SC_V ? " Validity" : ""));
	/* ALC650 specific*/
	if ((ac97->id & 0xfffffff0) == 0x414c4720 &&
	(snd_ac97_read(ac97, AC97_ALC650_CLOCK) & 0x01)) {
	val = snd_ac97_read(ac97, AC97_ALC650_SPDIF_INPUT_STATUS2);
	if (val & AC97_ALC650_CLOCK_LOCK) {
	val = snd_ac97_read(ac97, AC97_ALC650_SPDIF_INPUT_STATUS1);
	snd_iprintf(buffer, "SPDIF In Status :%s%s%s%s Category=0x%x Generation=%i",
	val & AC97_ALC650_PRO ? " PRO" : " Consumer",
	val & AC97_ALC650_NAUDIO ? " Non-audio" : " PCM",
	val & AC97_ALC650_COPY ? "" : " Copyright",
	val & AC97_ALC650_PRE ? " Preemph50/15" : "",
	(val & AC97_ALC650_CC_MASK) >> AC97_ALC650_CC_SHIFT,
	(val & AC97_ALC650_L) >> 15);
	val = snd_ac97_read(ac97, AC97_ALC650_SPDIF_INPUT_STATUS2);
	snd_iprintf(buffer, "%s Accuracy=%i%s%s\n",
	spdif_rates[(val & AC97_ALC650_SPSR_MASK) >> AC97_ALC650_SPSR_SHIFT],
	(val & AC97_ALC650_CLOCK_ACCURACY) >> AC97_ALC650_CLOCK_SHIFT,
	(val & AC97_ALC650_CLOCK_LOCK ? " Locked" : " Unlocked"),
	(val & AC97_ALC650_V ? " Validity?" : ""));
	} else {
	snd_iprintf(buffer, "SPDIF In Status : Not Locked\n");
	}
	}
	}
	if ((ac97->ext_id & AC97_EI_REV_MASK) >= AC97_EI_REV_23) {
	val = snd_ac97_read(ac97, AC97_INT_PAGING);
	snd_ac97_update_bits(ac97, AC97_INT_PAGING,
	AC97_PAGE_MASK, AC97_PAGE_1);
	snd_ac97_proc_read_functions(ac97, buffer);
	snd_ac97_update_bits(ac97, AC97_INT_PAGING,
	AC97_PAGE_MASK, val & AC97_PAGE_MASK);
	}


	__modem:
	mext = snd_ac97_read(ac97, AC97_EXTENDED_MID);
	if (mext == 0)
	return;

	snd_iprintf(buffer, "Extended modem ID: codec=%i%s%s%s%s%s\n",
	(mext & AC97_MEI_ADDR_MASK) >> AC97_MEI_ADDR_SHIFT,
	mext & AC97_MEI_CID2 ? " CID2" : "",
	mext & AC97_MEI_CID1 ? " CID1" : "",
	mext & AC97_MEI_HANDSET ? " HSET" : "",
	mext & AC97_MEI_LINE2 ? " LIN2" : "",
	mext & AC97_MEI_LINE1 ? " LIN1" : "");
	val = snd_ac97_read(ac97, AC97_EXTENDED_MSTATUS);
	snd_iprintf(buffer, "Modem status :%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n",
	val & AC97_MEA_GPIO ? " GPIO" : "",
	val & AC97_MEA_MREF ? " MREF" : "",
	val & AC97_MEA_ADC1 ? " ADC1" : "",
	val & AC97_MEA_DAC1 ? " DAC1" : "",
	val & AC97_MEA_ADC2 ? " ADC2" : "",
	val & AC97_MEA_DAC2 ? " DAC2" : "",
	val & AC97_MEA_HADC ? " HADC" : "",
	val & AC97_MEA_HDAC ? " HDAC" : "",
	val & AC97_MEA_PRA ? " PRA(GPIO)" : "",
	val & AC97_MEA_PRB ? " PRB(res)" : "",
	val & AC97_MEA_PRC ? " PRC(ADC1)" : "",
	val & AC97_MEA_PRD ? " PRD(DAC1)" : "",
	val & AC97_MEA_PRE ? " PRE(ADC2)" : "",
	val & AC97_MEA_PRF ? " PRF(DAC2)" : "",
	val & AC97_MEA_PRG ? " PRG(HADC)" : "",
	val & AC97_MEA_PRH ? " PRH(HDAC)" : "");
	if (mext & AC97_MEI_LINE1) {
	val = snd_ac97_read(ac97, AC97_LINE1_RATE);
	snd_iprintf(buffer, "Line1 rate : %iHz\n", val);
	}
	if (mext & AC97_MEI_LINE2) {
	val = snd_ac97_read(ac97, AC97_LINE2_RATE);
	snd_iprintf(buffer, "Line2 rate : %iHz\n", val);
	}
	if (mext & AC97_MEI_HANDSET) {
	val = snd_ac97_read(ac97, AC97_HANDSET_RATE);
	snd_iprintf(buffer, "Headset rate : %iHz\n", val);
	}
	}

	static void snd_ac97_proc_read(struct snd_info_entry entry, struct snd_info_buffer buffer)
	{
	struct snd_ac97 *ac97 = entry->private_data;

	mutex_lock(&ac97->page_mutex);
	if ((ac97->id & 0xffffff40) == AC97_ID_AD1881) { // Analog Devices AD1881/85/86
	int idx;
	for (idx = 0; idx < 3; idx++)
	if (ac97->spec.ad18xx.id[idx]) {
	/* select single codec */
	snd_ac97_update_bits(ac97, AC97_AD_SERIAL_CFG, 0x7000,
	ac97->spec.ad18xx.unchained[idx] \| ac97->spec.ad18xx.chained[idx]);
	snd_ac97_proc_read_main(ac97, buffer, idx);
	snd_iprintf(buffer, "\n\n");
	}
	/* select all codecs */
	snd_ac97_update_bits(ac97, AC97_AD_SERIAL_CFG, 0x7000, 0x7000);

	snd_iprintf(buffer, "\nAD18XX configuration\n");
	snd_iprintf(buffer, "Unchained : 0x%04x,0x%04x,0x%04x\n",
	ac97->spec.ad18xx.unchained[0],
	ac97->spec.ad18xx.unchained[1],
	ac97->spec.ad18xx.unchained[2]);
	snd_iprintf(buffer, "Chained : 0x%04x,0x%04x,0x%04x\n",
	ac97->spec.ad18xx.chained[0],
	ac97->spec.ad18xx.chained[1],
	ac97->spec.ad18xx.chained[2]);
	} else {
	snd_ac97_proc_read_main(ac97, buffer, 0);
	}
	mutex_unlock(&ac97->page_mutex);
	}

	#ifdef CONFIG_SND_DEBUG
	/* direct register write for debugging */
	static void snd_ac97_proc_regs_write(struct snd_info_entry entry, struct snd_info_buffer buffer)
	{
	struct snd_ac97 *ac97 = entry->private_data;
	char line[64];
	unsigned int reg, val;
	mutex_lock(&ac97->page_mutex);
	while (!snd_info_get_line(buffer, line, sizeof(line))) {
	if (sscanf(line, "%x %x", &reg, &val) != 2)
	continue;
	/* register must be even */
	if (reg < 0x80 && (reg & 1) == 0 && val <= 0xffff)
	snd_ac97_write_cache(ac97, reg, val);
	}
	mutex_unlock(&ac97->page_mutex);
	}
	#endif

	static void snd_ac97_proc_regs_read_main(struct snd_ac97 ac97, struct snd_info_buffer buffer, int subidx)
	{
	int reg, val;

	for (reg = 0; reg < 0x80; reg += 2) {
	val = snd_ac97_read(ac97, reg);
	snd_iprintf(buffer, "%i:%02x = %04x\n", subidx, reg, val);
	}
	}

	static void snd_ac97_proc_regs_read(struct snd_info_entry *entry,
	struct snd_info_buffer *buffer)
	{
	struct snd_ac97 *ac97 = entry->private_data;

	mutex_lock(&ac97->page_mutex);
	if ((ac97->id & 0xffffff40) == AC97_ID_AD1881) { // Analog Devices AD1881/85/86

	int idx;
	for (idx = 0; idx < 3; idx++)
	if (ac97->spec.ad18xx.id[idx]) {
	/* select single codec */
	snd_ac97_update_bits(ac97, AC97_AD_SERIAL_CFG, 0x7000,
	ac97->spec.ad18xx.unchained[idx] \| ac97->spec.ad18xx.chained[idx]);
	snd_ac97_proc_regs_read_main(ac97, buffer, idx);
	}
	/* select all codecs */
	snd_ac97_update_bits(ac97, AC97_AD_SERIAL_CFG, 0x7000, 0x7000);
	} else {
	snd_ac97_proc_regs_read_main(ac97, buffer, 0);
	}
	mutex_unlock(&ac97->page_mutex);
	}

	void snd_ac97_proc_init(struct snd_ac97 * ac97)
	{
	struct snd_info_entry *entry;
	char name[32];
	const char *prefix;

	if (ac97->bus->proc == NULL)
	return;
	prefix = ac97_is_audio(ac97) ? "ac97" : "mc97";
	sprintf(name, "%s#%d-%d", prefix, ac97->addr, ac97->num);
	if ((entry = snd_info_create_card_entry(ac97->bus->card, name, ac97->bus->proc)) != NULL) {
	snd_info_set_text_ops(entry, ac97, snd_ac97_proc_read);
	if (snd_info_register(entry) < 0) {
	snd_info_free_entry(entry);
	entry = NULL;
	}
	}
	ac97->proc = entry;
	sprintf(name, "%s#%d-%d+regs", prefix, ac97->addr, ac97->num);
	if ((entry = snd_info_create_card_entry(ac97->bus->card, name, ac97->bus->proc)) != NULL) {
	snd_info_set_text_ops(entry, ac97, snd_ac97_proc_regs_read);
	#ifdef CONFIG_SND_DEBUG
	entry->mode \|= S_IWUSR;
	entry->c.text.write = snd_ac97_proc_regs_write;
	#endif
	if (snd_info_register(entry) < 0) {
	snd_info_free_entry(entry);
	entry = NULL;
	}
	}
	ac97->proc_regs = entry;
	}

	void snd_ac97_proc_done(struct snd_ac97 * ac97)
	{
	snd_info_free_entry(ac97->proc_regs);
	ac97->proc_regs = NULL;
	snd_info_free_entry(ac97->proc);
	ac97->proc = NULL;
	}

	void snd_ac97_bus_proc_init(struct snd_ac97_bus * bus)
	{
	struct snd_info_entry *entry;
	char name[32];

	sprintf(name, "codec97#%d", bus->num);
	if ((entry = snd_info_create_card_entry(bus->card, name, bus->card->proc_root)) != NULL) {
	entry->mode = S_IFDIR \| S_IRUGO \| S_IXUGO;
	if (snd_info_register(entry) < 0) {
	snd_info_free_entry(entry);
	entry = NULL;
	}
	}
	bus->proc = entry;
	}

	void snd_ac97_bus_proc_done(struct snd_ac97_bus * bus)
	{
	snd_info_free_entry(bus->proc);
	bus->proc = NULL;
	}