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root/sound/pci/hda/hda_proc.c

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DEFINITIONS

This source file includes following definitions.
  1. get_wid_type_name
  2. print_amp_caps
  3. print_amp_vals
  4. print_pcm_rates
  5. print_pcm_bits
  6. print_pcm_formats
  7. print_pcm_caps
  8. get_jack_location
  9. get_jack_connection
  10. get_jack_color
  11. print_pin_caps
  12. print_pin_ctls
  13. print_vol_knob
  14. print_audio_io
  15. print_digital_conv
  16. get_pwr_state
  17. print_power_state
  18. print_unsol_cap
  19. print_proc_caps
  20. print_conn_list
  21. print_realtek_coef
  22. print_gpio
  23. print_codec_info
  24. snd_hda_codec_proc_new

/*
 * Universal Interface for Intel High Definition Audio Codec
 * 
 * Generic proc interface
 *
 * Copyright (c) 2004 Takashi Iwai <tiwai@suse.de>
 *
 *
 *  This driver 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 driver 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/init.h>
#include <sound/core.h>
#include "hda_codec.h"
#include "hda_local.h"

static const char *get_wid_type_name(unsigned int wid_value)
{
        static char *names[16] = {
                [AC_WID_AUD_OUT] = "Audio Output",
                [AC_WID_AUD_IN] = "Audio Input",
                [AC_WID_AUD_MIX] = "Audio Mixer",
                [AC_WID_AUD_SEL] = "Audio Selector",
                [AC_WID_PIN] = "Pin Complex",
                [AC_WID_POWER] = "Power Widget",
                [AC_WID_VOL_KNB] = "Volume Knob Widget",
                [AC_WID_BEEP] = "Beep Generator Widget",
                [AC_WID_VENDOR] = "Vendor Defined Widget",
        };
        wid_value &= 0xf;
        if (names[wid_value])
                return names[wid_value];
        else
                return "UNKNOWN Widget";
}

static void print_amp_caps(struct snd_info_buffer *buffer,
                           struct hda_codec *codec, hda_nid_t nid, int dir)
{
        unsigned int caps;
        caps = snd_hda_param_read(codec, nid,
                                  dir == HDA_OUTPUT ?
                                    AC_PAR_AMP_OUT_CAP : AC_PAR_AMP_IN_CAP);
        if (caps == -1 || caps == 0) {
                snd_iprintf(buffer, "N/A\n");
                return;
        }
        snd_iprintf(buffer, "ofs=0x%02x, nsteps=0x%02x, stepsize=0x%02x, "
                    "mute=%x\n",
                    caps & AC_AMPCAP_OFFSET,
                    (caps & AC_AMPCAP_NUM_STEPS) >> AC_AMPCAP_NUM_STEPS_SHIFT,
                    (caps & AC_AMPCAP_STEP_SIZE) >> AC_AMPCAP_STEP_SIZE_SHIFT,
                    (caps & AC_AMPCAP_MUTE) >> AC_AMPCAP_MUTE_SHIFT);
}

static void print_amp_vals(struct snd_info_buffer *buffer,
                           struct hda_codec *codec, hda_nid_t nid,
                           int dir, int stereo, int indices)
{
        unsigned int val;
        int i;

        dir = dir == HDA_OUTPUT ? AC_AMP_GET_OUTPUT : AC_AMP_GET_INPUT;
        for (i = 0; i < indices; i++) {
                snd_iprintf(buffer, " [");
                if (stereo) {
                        val = snd_hda_codec_read(codec, nid, 0,
                                                 AC_VERB_GET_AMP_GAIN_MUTE,
                                                 AC_AMP_GET_LEFT | dir | i);
                        snd_iprintf(buffer, "0x%02x ", val);
                }
                val = snd_hda_codec_read(codec, nid, 0,
                                         AC_VERB_GET_AMP_GAIN_MUTE,
                                         AC_AMP_GET_RIGHT | dir | i);
                snd_iprintf(buffer, "0x%02x]", val);
        }
        snd_iprintf(buffer, "\n");
}

static void print_pcm_rates(struct snd_info_buffer *buffer, unsigned int pcm)
{
        static unsigned int rates[] = {
                8000, 11025, 16000, 22050, 32000, 44100, 48000, 88200,
                96000, 176400, 192000, 384000
        };
        int i;

        pcm &= AC_SUPPCM_RATES;
        snd_iprintf(buffer, "    rates [0x%x]:", pcm);
        for (i = 0; i < ARRAY_SIZE(rates); i++) 
                if (pcm & (1 << i))
                        snd_iprintf(buffer, " %d", rates[i]);
        snd_iprintf(buffer, "\n");
}

static void print_pcm_bits(struct snd_info_buffer *buffer, unsigned int pcm)
{
        static unsigned int bits[] = { 8, 16, 20, 24, 32 };
        int i;

        pcm = (pcm >> 16) & 0xff;
        snd_iprintf(buffer, "    bits [0x%x]:", pcm);
        for (i = 0; i < ARRAY_SIZE(bits); i++)
                if (pcm & (1 << i))
                        snd_iprintf(buffer, " %d", bits[i]);
        snd_iprintf(buffer, "\n");
}

static void print_pcm_formats(struct snd_info_buffer *buffer,
                              unsigned int streams)
{
        snd_iprintf(buffer, "    formats [0x%x]:", streams & 0xf);
        if (streams & AC_SUPFMT_PCM)
                snd_iprintf(buffer, " PCM");
        if (streams & AC_SUPFMT_FLOAT32)
                snd_iprintf(buffer, " FLOAT");
        if (streams & AC_SUPFMT_AC3)
                snd_iprintf(buffer, " AC3");
        snd_iprintf(buffer, "\n");
}

static void print_pcm_caps(struct snd_info_buffer *buffer,
                           struct hda_codec *codec, hda_nid_t nid)
{
        unsigned int pcm = snd_hda_param_read(codec, nid, AC_PAR_PCM);
        unsigned int stream = snd_hda_param_read(codec, nid, AC_PAR_STREAM);
        if (pcm == -1 || stream == -1) {
                snd_iprintf(buffer, "N/A\n");
                return;
        }
        print_pcm_rates(buffer, pcm);
        print_pcm_bits(buffer, pcm);
        print_pcm_formats(buffer, stream);
}

static const char *get_jack_location(u32 cfg)
{
        static char *bases[7] = {
                "N/A", "Rear", "Front", "Left", "Right", "Top", "Bottom",
        };
        static unsigned char specials_idx[] = {
                0x07, 0x08,
                0x17, 0x18, 0x19,
                0x37, 0x38
        };
        static char *specials[] = {
                "Rear Panel", "Drive Bar",
                "Riser", "HDMI", "ATAPI",
                "Mobile-In", "Mobile-Out"
        };
        int i;
        cfg = (cfg & AC_DEFCFG_LOCATION) >> AC_DEFCFG_LOCATION_SHIFT;
        if ((cfg & 0x0f) < 7)
                return bases[cfg & 0x0f];
        for (i = 0; i < ARRAY_SIZE(specials_idx); i++) {
                if (cfg == specials_idx[i])
                        return specials[i];
        }
        return "UNKNOWN";
}

static const char *get_jack_connection(u32 cfg)
{
        static char *names[16] = {
                "Unknown", "1/8", "1/4", "ATAPI",
                "RCA", "Optical","Digital", "Analog",
                "DIN", "XLR", "RJ11", "Comb",
                NULL, NULL, NULL, "Other"
        };
        cfg = (cfg & AC_DEFCFG_CONN_TYPE) >> AC_DEFCFG_CONN_TYPE_SHIFT;
        if (names[cfg])
                return names[cfg];
        else
                return "UNKNOWN";
}

static const char *get_jack_color(u32 cfg)
{
        static char *names[16] = {
                "Unknown", "Black", "Grey", "Blue",
                "Green", "Red", "Orange", "Yellow",
                "Purple", "Pink", NULL, NULL,
                NULL, NULL, "White", "Other",
        };
        cfg = (cfg & AC_DEFCFG_COLOR) >> AC_DEFCFG_COLOR_SHIFT;
        if (names[cfg])
                return names[cfg];
        else
                return "UNKNOWN";
}

static void print_pin_caps(struct snd_info_buffer *buffer,
                           struct hda_codec *codec, hda_nid_t nid,
                           int *supports_vref)
{
        static char *jack_conns[4] = { "Jack", "N/A", "Fixed", "Both" };
        static char *jack_types[16] = {
                "Line Out", "Speaker", "HP Out", "CD",
                "SPDIF Out", "Digital Out", "Modem Line", "Modem Hand",
                "Line In", "Aux", "Mic", "Telephony",
                "SPDIF In", "Digitial In", "Reserved", "Other"
        };
        static char *jack_locations[4] = { "Ext", "Int", "Sep", "Oth" };
        unsigned int caps, val;

        caps = snd_hda_param_read(codec, nid, AC_PAR_PIN_CAP);
        snd_iprintf(buffer, "  Pincap 0x%08x:", caps);
        if (caps & AC_PINCAP_IN)
                snd_iprintf(buffer, " IN");
        if (caps & AC_PINCAP_OUT)
                snd_iprintf(buffer, " OUT");
        if (caps & AC_PINCAP_HP_DRV)
                snd_iprintf(buffer, " HP");
        if (caps & AC_PINCAP_EAPD)
                snd_iprintf(buffer, " EAPD");
        if (caps & AC_PINCAP_PRES_DETECT)
                snd_iprintf(buffer, " Detect");
        if (caps & AC_PINCAP_BALANCE)
                snd_iprintf(buffer, " Balanced");
        if (caps & AC_PINCAP_HDMI) {
                /* Realtek uses this bit as a different meaning */
                if ((codec->vendor_id >> 16) == 0x10ec)
                        snd_iprintf(buffer, " R/L");
                else
                        snd_iprintf(buffer, " HDMI");
        }
        if (caps & AC_PINCAP_TRIG_REQ)
                snd_iprintf(buffer, " Trigger");
        if (caps & AC_PINCAP_IMP_SENSE)
                snd_iprintf(buffer, " ImpSense");
        snd_iprintf(buffer, "\n");
        if (caps & AC_PINCAP_VREF) {
                unsigned int vref =
                        (caps & AC_PINCAP_VREF) >> AC_PINCAP_VREF_SHIFT;
                snd_iprintf(buffer, "    Vref caps:");
                if (vref & AC_PINCAP_VREF_HIZ)
                        snd_iprintf(buffer, " HIZ");
                if (vref & AC_PINCAP_VREF_50)
                        snd_iprintf(buffer, " 50");
                if (vref & AC_PINCAP_VREF_GRD)
                        snd_iprintf(buffer, " GRD");
                if (vref & AC_PINCAP_VREF_80)
                        snd_iprintf(buffer, " 80");
                if (vref & AC_PINCAP_VREF_100)
                        snd_iprintf(buffer, " 100");
                snd_iprintf(buffer, "\n");
                *supports_vref = 1;
        } else
                *supports_vref = 0;
        if (caps & AC_PINCAP_EAPD) {
                val = snd_hda_codec_read(codec, nid, 0,
                                         AC_VERB_GET_EAPD_BTLENABLE, 0);
                snd_iprintf(buffer, "  EAPD 0x%x:", val);
                if (val & AC_EAPDBTL_BALANCED)
                        snd_iprintf(buffer, " BALANCED");
                if (val & AC_EAPDBTL_EAPD)
                        snd_iprintf(buffer, " EAPD");
                if (val & AC_EAPDBTL_LR_SWAP)
                        snd_iprintf(buffer, " R/L");
                snd_iprintf(buffer, "\n");
        }
        caps = snd_hda_codec_read(codec, nid, 0, AC_VERB_GET_CONFIG_DEFAULT, 0);
        snd_iprintf(buffer, "  Pin Default 0x%08x: [%s] %s at %s %s\n", caps,
                    jack_conns[(caps & AC_DEFCFG_PORT_CONN) >> AC_DEFCFG_PORT_CONN_SHIFT],
                    jack_types[(caps & AC_DEFCFG_DEVICE) >> AC_DEFCFG_DEVICE_SHIFT],
                    jack_locations[(caps >> (AC_DEFCFG_LOCATION_SHIFT + 4)) & 3],
                    get_jack_location(caps));
        snd_iprintf(buffer, "    Conn = %s, Color = %s\n",
                    get_jack_connection(caps),
                    get_jack_color(caps));
        /* Default association and sequence values refer to default grouping
         * of pin complexes and their sequence within the group. This is used
         * for priority and resource allocation.
         */
        snd_iprintf(buffer, "    DefAssociation = 0x%x, Sequence = 0x%x\n",
                    (caps & AC_DEFCFG_DEF_ASSOC) >> AC_DEFCFG_ASSOC_SHIFT,
                    caps & AC_DEFCFG_SEQUENCE);
        if (((caps & AC_DEFCFG_MISC) >> AC_DEFCFG_MISC_SHIFT) &
            AC_DEFCFG_MISC_NO_PRESENCE) {
                /* Miscellaneous bit indicates external hardware does not
                 * support presence detection even if the pin complex
                 * indicates it is supported.
                 */
                snd_iprintf(buffer, "    Misc = NO_PRESENCE\n");
        }
}

static void print_pin_ctls(struct snd_info_buffer *buffer,
                           struct hda_codec *codec, hda_nid_t nid,
                           int supports_vref)
{
        unsigned int pinctls;

        pinctls = snd_hda_codec_read(codec, nid, 0,
                                     AC_VERB_GET_PIN_WIDGET_CONTROL, 0);
        snd_iprintf(buffer, "  Pin-ctls: 0x%02x:", pinctls);
        if (pinctls & AC_PINCTL_IN_EN)
                snd_iprintf(buffer, " IN");
        if (pinctls & AC_PINCTL_OUT_EN)
                snd_iprintf(buffer, " OUT");
        if (pinctls & AC_PINCTL_HP_EN)
                snd_iprintf(buffer, " HP");
        if (supports_vref) {
                int vref = pinctls & AC_PINCTL_VREFEN;
                switch (vref) {
                case AC_PINCTL_VREF_HIZ:
                        snd_iprintf(buffer, " VREF_HIZ");
                        break;
                case AC_PINCTL_VREF_50:
                        snd_iprintf(buffer, " VREF_50");
                        break;
                case AC_PINCTL_VREF_GRD:
                        snd_iprintf(buffer, " VREF_GRD");
                        break;
                case AC_PINCTL_VREF_80:
                        snd_iprintf(buffer, " VREF_80");
                        break;
                case AC_PINCTL_VREF_100:
                        snd_iprintf(buffer, " VREF_100");
                        break;
                }
        }
        snd_iprintf(buffer, "\n");
}

static void print_vol_knob(struct snd_info_buffer *buffer,
                           struct hda_codec *codec, hda_nid_t nid)
{
        unsigned int cap = snd_hda_param_read(codec, nid,
                                              AC_PAR_VOL_KNB_CAP);
        snd_iprintf(buffer, "  Volume-Knob: delta=%d, steps=%d, ",
                    (cap >> 7) & 1, cap & 0x7f);
        cap = snd_hda_codec_read(codec, nid, 0,
                                 AC_VERB_GET_VOLUME_KNOB_CONTROL, 0);
        snd_iprintf(buffer, "direct=%d, val=%d\n",
                    (cap >> 7) & 1, cap & 0x7f);
}

static void print_audio_io(struct snd_info_buffer *buffer,
                           struct hda_codec *codec, hda_nid_t nid,
                           unsigned int wid_type)
{
        int conv = snd_hda_codec_read(codec, nid, 0, AC_VERB_GET_CONV, 0);
        snd_iprintf(buffer,
                    "  Converter: stream=%d, channel=%d\n",
                    (conv & AC_CONV_STREAM) >> AC_CONV_STREAM_SHIFT,
                    conv & AC_CONV_CHANNEL);

        if (wid_type == AC_WID_AUD_IN && (conv & AC_CONV_CHANNEL) == 0) {
                int sdi = snd_hda_codec_read(codec, nid, 0,
                                             AC_VERB_GET_SDI_SELECT, 0);
                snd_iprintf(buffer, "  SDI-Select: %d\n",
                            sdi & AC_SDI_SELECT);
        }
}

static void print_digital_conv(struct snd_info_buffer *buffer,
                               struct hda_codec *codec, hda_nid_t nid)
{
        unsigned int digi1 = snd_hda_codec_read(codec, nid, 0,
                                                AC_VERB_GET_DIGI_CONVERT_1, 0);
        snd_iprintf(buffer, "  Digital:");
        if (digi1 & AC_DIG1_ENABLE)
                snd_iprintf(buffer, " Enabled");
        if (digi1 & AC_DIG1_V)
                snd_iprintf(buffer, " Validity");
        if (digi1 & AC_DIG1_VCFG)
                snd_iprintf(buffer, " ValidityCfg");
        if (digi1 & AC_DIG1_EMPHASIS)
                snd_iprintf(buffer, " Preemphasis");
        if (digi1 & AC_DIG1_COPYRIGHT)
                snd_iprintf(buffer, " Copyright");
        if (digi1 & AC_DIG1_NONAUDIO)
                snd_iprintf(buffer, " Non-Audio");
        if (digi1 & AC_DIG1_PROFESSIONAL)
                snd_iprintf(buffer, " Pro");
        if (digi1 & AC_DIG1_LEVEL)
                snd_iprintf(buffer, " GenLevel");
        snd_iprintf(buffer, "\n");
        snd_iprintf(buffer, "  Digital category: 0x%x\n",
                    (digi1 >> 8) & AC_DIG2_CC);
}

static const char *get_pwr_state(u32 state)
{
        static const char *buf[4] = {
                "D0", "D1", "D2", "D3"
        };
        if (state < 4)
                return buf[state];
        return "UNKNOWN";
}

static void print_power_state(struct snd_info_buffer *buffer,
                              struct hda_codec *codec, hda_nid_t nid)
{
        int pwr = snd_hda_codec_read(codec, nid, 0,
                                     AC_VERB_GET_POWER_STATE, 0);
        snd_iprintf(buffer, "  Power: setting=%s, actual=%s\n",
                    get_pwr_state(pwr & AC_PWRST_SETTING),
                    get_pwr_state((pwr & AC_PWRST_ACTUAL) >>
                                  AC_PWRST_ACTUAL_SHIFT));
}

static void print_unsol_cap(struct snd_info_buffer *buffer,
                              struct hda_codec *codec, hda_nid_t nid)
{
        int unsol = snd_hda_codec_read(codec, nid, 0,
                                       AC_VERB_GET_UNSOLICITED_RESPONSE, 0);
        snd_iprintf(buffer,
                    "  Unsolicited: tag=%02x, enabled=%d\n",
                    unsol & AC_UNSOL_TAG,
                    (unsol & AC_UNSOL_ENABLED) ? 1 : 0);
}

static void print_proc_caps(struct snd_info_buffer *buffer,
                            struct hda_codec *codec, hda_nid_t nid)
{
        unsigned int proc_caps = snd_hda_param_read(codec, nid,
                                                    AC_PAR_PROC_CAP);
        snd_iprintf(buffer, "  Processing caps: benign=%d, ncoeff=%d\n",
                    proc_caps & AC_PCAP_BENIGN,
                    (proc_caps & AC_PCAP_NUM_COEF) >> AC_PCAP_NUM_COEF_SHIFT);
}

static void print_conn_list(struct snd_info_buffer *buffer,
                            struct hda_codec *codec, hda_nid_t nid,
                            unsigned int wid_type, hda_nid_t *conn,
                            int conn_len)
{
        int c, curr = -1;

        if (conn_len > 1 && wid_type != AC_WID_AUD_MIX)
                curr = snd_hda_codec_read(codec, nid, 0,
                                          AC_VERB_GET_CONNECT_SEL, 0);
        snd_iprintf(buffer, "  Connection: %d\n", conn_len);
        if (conn_len > 0) {
                snd_iprintf(buffer, "    ");
                for (c = 0; c < conn_len; c++) {
                        snd_iprintf(buffer, " 0x%02x", conn[c]);
                        if (c == curr)
                                snd_iprintf(buffer, "*");
                }
                snd_iprintf(buffer, "\n");
        }
}

static void print_realtek_coef(struct snd_info_buffer *buffer,
                               struct hda_codec *codec, hda_nid_t nid)
{
        int coeff = snd_hda_codec_read(codec, nid, 0,
                                       AC_VERB_GET_PROC_COEF, 0);
        snd_iprintf(buffer, "  Processing Coefficient: 0x%02x\n", coeff);
        coeff = snd_hda_codec_read(codec, nid, 0,
                                   AC_VERB_GET_COEF_INDEX, 0);
        snd_iprintf(buffer, "  Coefficient Index: 0x%02x\n", coeff);
}

static void print_gpio(struct snd_info_buffer *buffer,
                       struct hda_codec *codec, hda_nid_t nid)
{
        unsigned int gpio =
                snd_hda_param_read(codec, codec->afg, AC_PAR_GPIO_CAP);
        unsigned int enable, direction, wake, unsol, sticky, data;
        int i, max;
        snd_iprintf(buffer, "GPIO: io=%d, o=%d, i=%d, "
                    "unsolicited=%d, wake=%d\n",
                    gpio & AC_GPIO_IO_COUNT,
                    (gpio & AC_GPIO_O_COUNT) >> AC_GPIO_O_COUNT_SHIFT,
                    (gpio & AC_GPIO_I_COUNT) >> AC_GPIO_I_COUNT_SHIFT,
                    (gpio & AC_GPIO_UNSOLICITED) ? 1 : 0,
                    (gpio & AC_GPIO_WAKE) ? 1 : 0);
        max = gpio & AC_GPIO_IO_COUNT;
        enable = snd_hda_codec_read(codec, nid, 0,
                                    AC_VERB_GET_GPIO_MASK, 0);
        direction = snd_hda_codec_read(codec, nid, 0,
                                       AC_VERB_GET_GPIO_DIRECTION, 0);
        wake = snd_hda_codec_read(codec, nid, 0,
                                  AC_VERB_GET_GPIO_WAKE_MASK, 0);
        unsol  = snd_hda_codec_read(codec, nid, 0,
                                    AC_VERB_GET_GPIO_UNSOLICITED_RSP_MASK, 0);
        sticky = snd_hda_codec_read(codec, nid, 0,
                                    AC_VERB_GET_GPIO_STICKY_MASK, 0);
        data = snd_hda_codec_read(codec, nid, 0,
                                  AC_VERB_GET_GPIO_DATA, 0);
        for (i = 0; i < max; ++i)
                snd_iprintf(buffer,
                            "  IO[%d]: enable=%d, dir=%d, wake=%d, "
                            "sticky=%d, data=%d\n", i,
                            (enable & (1<<i)) ? 1 : 0,
                            (direction & (1<<i)) ? 1 : 0,
                            (wake & (1<<i)) ? 1 : 0,
                            (sticky & (1<<i)) ? 1 : 0,
                            (data & (1<<i)) ? 1 : 0);
        /* FIXME: add GPO and GPI pin information */
}

static void print_codec_info(struct snd_info_entry *entry,
                             struct snd_info_buffer *buffer)
{
        struct hda_codec *codec = entry->private_data;
        char buf[32];
        hda_nid_t nid;
        int i, nodes;

        snd_hda_get_codec_name(codec, buf, sizeof(buf));
        snd_iprintf(buffer, "Codec: %s\n", buf);
        snd_iprintf(buffer, "Address: %d\n", codec->addr);
        snd_iprintf(buffer, "Vendor Id: 0x%x\n", codec->vendor_id);
        snd_iprintf(buffer, "Subsystem Id: 0x%x\n", codec->subsystem_id);
        snd_iprintf(buffer, "Revision Id: 0x%x\n", codec->revision_id);

        if (codec->mfg)
                snd_iprintf(buffer, "Modem Function Group: 0x%x\n", codec->mfg);
        else
                snd_iprintf(buffer, "No Modem Function Group found\n");

        if (! codec->afg)
                return;
        snd_hda_power_up(codec);
        snd_iprintf(buffer, "Default PCM:\n");
        print_pcm_caps(buffer, codec, codec->afg);
        snd_iprintf(buffer, "Default Amp-In caps: ");
        print_amp_caps(buffer, codec, codec->afg, HDA_INPUT);
        snd_iprintf(buffer, "Default Amp-Out caps: ");
        print_amp_caps(buffer, codec, codec->afg, HDA_OUTPUT);

        nodes = snd_hda_get_sub_nodes(codec, codec->afg, &nid);
        if (! nid || nodes < 0) {
                snd_iprintf(buffer, "Invalid AFG subtree\n");
                snd_hda_power_down(codec);
                return;
        }

        print_gpio(buffer, codec, codec->afg);

        for (i = 0; i < nodes; i++, nid++) {
                unsigned int wid_caps =
                        snd_hda_param_read(codec, nid,
                                           AC_PAR_AUDIO_WIDGET_CAP);
                unsigned int wid_type =
                        (wid_caps & AC_WCAP_TYPE) >> AC_WCAP_TYPE_SHIFT;
                hda_nid_t conn[HDA_MAX_CONNECTIONS];
                int conn_len = 0;

                snd_iprintf(buffer, "Node 0x%02x [%s] wcaps 0x%x:", nid,
                            get_wid_type_name(wid_type), wid_caps);
                if (wid_caps & AC_WCAP_STEREO) {
                        unsigned int chans;
                        chans = (wid_caps & AC_WCAP_CHAN_CNT_EXT) >> 13;
                        chans = ((chans << 1) | 1) + 1;
                        if (chans == 2)
                                snd_iprintf(buffer, " Stereo");
                        else
                                snd_iprintf(buffer, " %d-Channels", chans);
                } else
                        snd_iprintf(buffer, " Mono");
                if (wid_caps & AC_WCAP_DIGITAL)
                        snd_iprintf(buffer, " Digital");
                if (wid_caps & AC_WCAP_IN_AMP)
                        snd_iprintf(buffer, " Amp-In");
                if (wid_caps & AC_WCAP_OUT_AMP)
                        snd_iprintf(buffer, " Amp-Out");
                if (wid_caps & AC_WCAP_STRIPE)
                        snd_iprintf(buffer, " Stripe");
                if (wid_caps & AC_WCAP_LR_SWAP)
                        snd_iprintf(buffer, " R/L");
                if (wid_caps & AC_WCAP_CP_CAPS)
                        snd_iprintf(buffer, " CP");
                snd_iprintf(buffer, "\n");

                /* volume knob is a special widget that always have connection
                 * list
                 */
                if (wid_type == AC_WID_VOL_KNB)
                        wid_caps |= AC_WCAP_CONN_LIST;

                if (wid_caps & AC_WCAP_CONN_LIST)
                        conn_len = snd_hda_get_connections(codec, nid, conn,
                                                           HDA_MAX_CONNECTIONS);

                if (wid_caps & AC_WCAP_IN_AMP) {
                        snd_iprintf(buffer, "  Amp-In caps: ");
                        print_amp_caps(buffer, codec, nid, HDA_INPUT);
                        snd_iprintf(buffer, "  Amp-In vals: ");
                        print_amp_vals(buffer, codec, nid, HDA_INPUT,
                                       wid_caps & AC_WCAP_STEREO,
                                       wid_type == AC_WID_PIN ? 1 : conn_len);
                }
                if (wid_caps & AC_WCAP_OUT_AMP) {
                        snd_iprintf(buffer, "  Amp-Out caps: ");
                        print_amp_caps(buffer, codec, nid, HDA_OUTPUT);
                        snd_iprintf(buffer, "  Amp-Out vals: ");
                        print_amp_vals(buffer, codec, nid, HDA_OUTPUT,
                                       wid_caps & AC_WCAP_STEREO, 1);
                }

                switch (wid_type) {
                case AC_WID_PIN: {
                        int supports_vref;
                        print_pin_caps(buffer, codec, nid, &supports_vref);
                        print_pin_ctls(buffer, codec, nid, supports_vref);
                        break;
                }
                case AC_WID_VOL_KNB:
                        print_vol_knob(buffer, codec, nid);
                        break;
                case AC_WID_AUD_OUT:
                case AC_WID_AUD_IN:
                        print_audio_io(buffer, codec, nid, wid_type);
                        if (wid_caps & AC_WCAP_DIGITAL)
                                print_digital_conv(buffer, codec, nid);
                        if (wid_caps & AC_WCAP_FORMAT_OVRD) {
                                snd_iprintf(buffer, "  PCM:\n");
                                print_pcm_caps(buffer, codec, nid);
                        }
                        break;
                }

                if (wid_caps & AC_WCAP_UNSOL_CAP)
                        print_unsol_cap(buffer, codec, nid);

                if (wid_caps & AC_WCAP_POWER)
                        print_power_state(buffer, codec, nid);

                if (wid_caps & AC_WCAP_DELAY)
                        snd_iprintf(buffer, "  Delay: %d samples\n",
                                    (wid_caps & AC_WCAP_DELAY) >>
                                    AC_WCAP_DELAY_SHIFT);

                if (wid_caps & AC_WCAP_CONN_LIST)
                        print_conn_list(buffer, codec, nid, wid_type,
                                        conn, conn_len);

                if (wid_caps & AC_WCAP_PROC_WID)
                        print_proc_caps(buffer, codec, nid);

                /* NID 0x20 == Realtek Define Registers */
                if (codec->vendor_id == 0x10ec && nid == 0x20)
                        print_realtek_coef(buffer, codec, nid);
        }
        snd_hda_power_down(codec);
}

/*
 * create a proc read
 */
int snd_hda_codec_proc_new(struct hda_codec *codec)
{
        char name[32];
        struct snd_info_entry *entry;
        int err;

        snprintf(name, sizeof(name), "codec#%d", codec->addr);
        err = snd_card_proc_new(codec->bus->card, name, &entry);
        if (err < 0)
                return err;

        snd_info_set_text_ops(entry, codec, print_codec_info);
        return 0;
}


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