sound/usb/proc.c

   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 */
  32 static 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 */
  38 static 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  */
  46 static 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 (!atomic_read(&chip->shutdown))
  50                 snd_iprintf(buffer, "%03d/%03d\n", chip->dev->bus->busnum, chip->dev->devnum);
  51 }
  52
  53 static 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 (!atomic_read(&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
  62 void 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  */
  74 static void proc_dump_substream_formats(struct snd_usb_substream *subs, struct snd_info_buffer *buffer)
  75 {
  76         struct audioformat *fp;
  77         static char *sync_types[4] = {
  78                 "NONE", "ASYNC", "ADAPTIVE", "SYNC"
  79         };
  80
  81         list_for_each_entry(fp, &subs->fmt_list, list) {
  82                 snd_pcm_format_t fmt;
  83
  84                 snd_iprintf(buffer, "  Interface %d\n", fp->iface);
  85                 snd_iprintf(buffer, "    Altset %d\n", fp->altsetting);
  86                 snd_iprintf(buffer, "    Format:");
  87                 for (fmt = 0; fmt <= SNDRV_PCM_FORMAT_LAST; ++fmt)
  88                         if (fp->formats & pcm_format_to_bits(fmt))
  89                                 snd_iprintf(buffer, " %s",
  90                                             snd_pcm_format_name(fmt));
  91                 snd_iprintf(buffer, "\n");
  92                 snd_iprintf(buffer, "    Channels: %d\n", fp->channels);
  93                 snd_iprintf(buffer, "    Endpoint: %d %s (%s)\n",
  94                             fp->endpoint & USB_ENDPOINT_NUMBER_MASK,
  95                             fp->endpoint & USB_DIR_IN ? "IN" : "OUT",
  96                             sync_types[(fp->ep_attr & USB_ENDPOINT_SYNCTYPE) >> 2]);
  97                 if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS) {
  98                         snd_iprintf(buffer, "    Rates: %d - %d (continuous)\n",
  99                                     fp->rate_min, fp->rate_max);
 100                 } else {
 101                         unsigned int i;
 102                         snd_iprintf(buffer, "    Rates: ");
 103                         for (i = 0; i < fp->nr_rates; i++) {
 104                                 if (i > 0)
 105                                         snd_iprintf(buffer, ", ");
 106                                 snd_iprintf(buffer, "%d", fp->rate_table[i]);
 107                         }
 108                         snd_iprintf(buffer, "\n");
 109                 }
 110                 if (subs->speed != USB_SPEED_FULL)
 111                         snd_iprintf(buffer, "    Data packet interval: %d us\n",
 112                                     125 * (1 << fp->datainterval));
 113                 // snd_iprintf(buffer, "    Max Packet Size = %d\n", fp->maxpacksize);
 114                 // snd_iprintf(buffer, "    EP Attribute = %#x\n", fp->attributes);
 115         }
 116 }
 117
 118 static void proc_dump_ep_status(struct snd_usb_substream *subs,
 119                                 struct snd_usb_endpoint *data_ep,
 120                                 struct snd_usb_endpoint *sync_ep,
 121                                 struct snd_info_buffer *buffer)
 122 {
 123         if (!data_ep)
 124                 return;
 125         snd_iprintf(buffer, "    Packet Size = %d\n", data_ep->curpacksize);
 126         snd_iprintf(buffer, "    Momentary freq = %u Hz (%#x.%04x)\n",
 127                     subs->speed == USB_SPEED_FULL
 128                     ? get_full_speed_hz(data_ep->freqm)
 129                     : get_high_speed_hz(data_ep->freqm),
 130                     data_ep->freqm >> 16, data_ep->freqm & 0xffff);
 131         if (sync_ep && data_ep->freqshift != INT_MIN) {
 132                 int res = 16 - data_ep->freqshift;
 133                 snd_iprintf(buffer, "    Feedback Format = %d.%d\n",
 134                             (sync_ep->syncmaxsize > 3 ? 32 : 24) - res, res);
 135         }
 136 }
 137
 138 static 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, subs->sync_endpoint, buffer);
 145         } else {
 146                 snd_iprintf(buffer, "  Status: Stop\n");
 147         }
 148 }
 149
 150 static void proc_pcm_format_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
 151 {
 152         struct snd_usb_stream *stream = entry->private_data;
 153
 154         snd_iprintf(buffer, "%s : %s\n", stream->chip->card->longname, stream->pcm->name);
 155
 156         if (stream->substream[SNDRV_PCM_STREAM_PLAYBACK].num_formats) {
 157                 snd_iprintf(buffer, "\nPlayback:\n");
 158                 proc_dump_substream_status(&stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer);
 159                 proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer);
 160         }
 161         if (stream->substream[SNDRV_PCM_STREAM_CAPTURE].num_formats) {
 162                 snd_iprintf(buffer, "\nCapture:\n");
 163                 proc_dump_substream_status(&stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer);
 164                 proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer);
 165         }
 166 }
 167
 168 void snd_usb_proc_pcm_format_add(struct snd_usb_stream *stream)
 169 {
 170         struct snd_info_entry *entry;
 171         char name[32];
 172         struct snd_card *card = stream->chip->card;
 173
 174         sprintf(name, "stream%d", stream->pcm_index);
 175         if (!snd_card_proc_new(card, name, &entry))
 176                 snd_info_set_text_ops(entry, stream, proc_pcm_format_read);
 177 }
 178