linux/sound/usb/proc.c
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   1/*
   2 *   This program is free software; you can redistribute it and/or modify
   3 *   it under the terms of the GNU General Public License as published by
   4 *   the Free Software Foundation; either version 2 of the License, or
   5 *   (at your option) any later version.
   6 *
   7 *   This program is distributed in the hope that it will be useful,
   8 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
   9 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10 *   GNU General Public License for more details.
  11 *
  12 *   You should have received a copy of the GNU General Public License
  13 *   along with this program; if not, write to the Free Software
  14 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  15 *
  16 */
  17
  18#include <linux/init.h>
  19#include <linux/usb.h>
  20
  21#include <sound/core.h>
  22#include <sound/info.h>
  23#include <sound/pcm.h>
  24
  25#include "usbaudio.h"
  26#include "helper.h"
  27#include "card.h"
  28#include "endpoint.h"
  29#include "proc.h"
  30
  31/* convert our full speed USB rate into sampling rate in Hz */
  32static inline unsigned get_full_speed_hz(unsigned int usb_rate)
  33{
  34        return (usb_rate * 125 + (1 << 12)) >> 13;
  35}
  36
  37/* convert our high speed USB rate into sampling rate in Hz */
  38static inline unsigned get_high_speed_hz(unsigned int usb_rate)
  39{
  40        return (usb_rate * 125 + (1 << 9)) >> 10;
  41}
  42
  43/*
  44 * common proc files to show the usb device info
  45 */
  46static void proc_audio_usbbus_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
  47{
  48        struct snd_usb_audio *chip = entry->private_data;
  49        if (!chip->shutdown)
  50                snd_iprintf(buffer, "%03d/%03d\n", chip->dev->bus->busnum, chip->dev->devnum);
  51}
  52
  53static void proc_audio_usbid_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
  54{
  55        struct snd_usb_audio *chip = entry->private_data;
  56        if (!chip->shutdown)
  57                snd_iprintf(buffer, "%04x:%04x\n", 
  58                            USB_ID_VENDOR(chip->usb_id),
  59                            USB_ID_PRODUCT(chip->usb_id));
  60}
  61
  62void snd_usb_audio_create_proc(struct snd_usb_audio *chip)
  63{
  64        struct snd_info_entry *entry;
  65        if (!snd_card_proc_new(chip->card, "usbbus", &entry))
  66                snd_info_set_text_ops(entry, chip, proc_audio_usbbus_read);
  67        if (!snd_card_proc_new(chip->card, "usbid", &entry))
  68                snd_info_set_text_ops(entry, chip, proc_audio_usbid_read);
  69}
  70
  71/*
  72 * proc interface for list the supported pcm formats
  73 */
  74static void proc_dump_substream_formats(struct snd_usb_substream *subs, struct snd_info_buffer *buffer)
  75{
  76        struct list_head *p;
  77        static char *sync_types[4] = {
  78                "NONE", "ASYNC", "ADAPTIVE", "SYNC"
  79        };
  80
  81        list_for_each(p, &subs->fmt_list) {
  82                struct audioformat *fp;
  83                snd_pcm_format_t fmt;
  84                fp = list_entry(p, struct audioformat, list);
  85                snd_iprintf(buffer, "  Interface %d\n", fp->iface);
  86                snd_iprintf(buffer, "    Altset %d\n", fp->altsetting);
  87                snd_iprintf(buffer, "    Format:");
  88                for (fmt = 0; fmt <= SNDRV_PCM_FORMAT_LAST; ++fmt)
  89                        if (fp->formats & (1uLL << fmt))
  90                                snd_iprintf(buffer, " %s",
  91                                            snd_pcm_format_name(fmt));
  92                snd_iprintf(buffer, "\n");
  93                snd_iprintf(buffer, "    Channels: %d\n", fp->channels);
  94                snd_iprintf(buffer, "    Endpoint: %d %s (%s)\n",
  95                            fp->endpoint & USB_ENDPOINT_NUMBER_MASK,
  96                            fp->endpoint & USB_DIR_IN ? "IN" : "OUT",
  97                            sync_types[(fp->ep_attr & USB_ENDPOINT_SYNCTYPE) >> 2]);
  98                if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS) {
  99                        snd_iprintf(buffer, "    Rates: %d - %d (continuous)\n",
 100                                    fp->rate_min, fp->rate_max);
 101                } else {
 102                        unsigned int i;
 103                        snd_iprintf(buffer, "    Rates: ");
 104                        for (i = 0; i < fp->nr_rates; i++) {
 105                                if (i > 0)
 106                                        snd_iprintf(buffer, ", ");
 107                                snd_iprintf(buffer, "%d", fp->rate_table[i]);
 108                        }
 109                        snd_iprintf(buffer, "\n");
 110                }
 111                if (subs->speed != USB_SPEED_FULL)
 112                        snd_iprintf(buffer, "    Data packet interval: %d us\n",
 113                                    125 * (1 << fp->datainterval));
 114                // snd_iprintf(buffer, "    Max Packet Size = %d\n", fp->maxpacksize);
 115                // snd_iprintf(buffer, "    EP Attribute = %#x\n", fp->attributes);
 116        }
 117}
 118
 119static void proc_dump_ep_status(struct snd_usb_substream *subs,
 120                                struct snd_usb_endpoint *ep,
 121                                struct snd_info_buffer *buffer)
 122{
 123        if (!ep)
 124                return;
 125        snd_iprintf(buffer, "    Packet Size = %d\n", ep->curpacksize);
 126        snd_iprintf(buffer, "    Momentary freq = %u Hz (%#x.%04x)\n",
 127                    subs->speed == USB_SPEED_FULL
 128                    ? get_full_speed_hz(ep->freqm)
 129                    : get_high_speed_hz(ep->freqm),
 130                    ep->freqm >> 16, ep->freqm & 0xffff);
 131        if (ep->freqshift != INT_MIN) {
 132                int res = 16 - ep->freqshift;
 133                snd_iprintf(buffer, "    Feedback Format = %d.%d\n",
 134                            (ep->syncmaxsize > 3 ? 32 : 24) - res, res);
 135        }
 136}
 137
 138static void proc_dump_substream_status(struct snd_usb_substream *subs, struct snd_info_buffer *buffer)
 139{
 140        if (subs->running) {
 141                snd_iprintf(buffer, "  Status: Running\n");
 142                snd_iprintf(buffer, "    Interface = %d\n", subs->interface);
 143                snd_iprintf(buffer, "    Altset = %d\n", subs->altset_idx);
 144                proc_dump_ep_status(subs, subs->data_endpoint, buffer);
 145                proc_dump_ep_status(subs, subs->sync_endpoint, buffer);
 146        } else {
 147                snd_iprintf(buffer, "  Status: Stop\n");
 148        }
 149}
 150
 151static void proc_pcm_format_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
 152{
 153        struct snd_usb_stream *stream = entry->private_data;
 154
 155        snd_iprintf(buffer, "%s : %s\n", stream->chip->card->longname, stream->pcm->name);
 156
 157        if (stream->substream[SNDRV_PCM_STREAM_PLAYBACK].num_formats) {
 158                snd_iprintf(buffer, "\nPlayback:\n");
 159                proc_dump_substream_status(&stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer);
 160                proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer);
 161        }
 162        if (stream->substream[SNDRV_PCM_STREAM_CAPTURE].num_formats) {
 163                snd_iprintf(buffer, "\nCapture:\n");
 164                proc_dump_substream_status(&stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer);
 165                proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer);
 166        }
 167}
 168
 169void snd_usb_proc_pcm_format_add(struct snd_usb_stream *stream)
 170{
 171        struct snd_info_entry *entry;
 172        char name[32];
 173        struct snd_card *card = stream->chip->card;
 174
 175        sprintf(name, "stream%d", stream->pcm_index);
 176        if (!snd_card_proc_new(card, name, &entry))
 177                snd_info_set_text_ops(entry, stream, proc_pcm_format_read);
 178}
 179
 180
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