release/src-rt-6.x.4708/linux/linux-2.6.36/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 "proc.h"
  29
  30 /* convert our full speed USB rate into sampling rate in Hz */
  31 static inline unsigned get_full_speed_hz(unsigned int usb_rate)
  32 {
  33         return (usb_rate * 125 + (1 << 12)) >> 13;
  34 }
  35
  36 /* convert our high speed USB rate into sampling rate in Hz */
  37 static inline unsigned get_high_speed_hz(unsigned int usb_rate)
  38 {
  39         return (usb_rate * 125 + (1 << 9)) >> 10;
  40 }
  41
  42 /*
  43  * common proc files to show the usb device info
  44  */
  45 static void proc_audio_usbbus_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
  46 {
  47         struct snd_usb_audio *chip = entry->private_data;
  48         if (!chip->shutdown)
  49                 snd_iprintf(buffer, "%03d/%03d\n", chip->dev->bus->busnum, chip->dev->devnum);
  50 }
  51
  52 static void proc_audio_usbid_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
  53 {
  54         struct snd_usb_audio *chip = entry->private_data;
  55         if (!chip->shutdown)
  56                 snd_iprintf(buffer, "%04x:%04x\n",
  57                             USB_ID_VENDOR(chip->usb_id),
  58                             USB_ID_PRODUCT(chip->usb_id));
  59 }
  60
  61 void snd_usb_audio_create_proc(struct snd_usb_audio *chip)
  62 {
  63         struct snd_info_entry *entry;
  64         if (!snd_card_proc_new(chip->card, "usbbus", &entry))
  65                 snd_info_set_text_ops(entry, chip, proc_audio_usbbus_read);
  66         if (!snd_card_proc_new(chip->card, "usbid", &entry))
  67                 snd_info_set_text_ops(entry, chip, proc_audio_usbid_read);
  68 }
  69
  70 /*
  71  * proc interface for list the supported pcm formats
  72  */
  73 static void proc_dump_substream_formats(struct snd_usb_substream *subs, struct snd_info_buffer *buffer)
  74 {
  75         struct list_head *p;
  76         static char *sync_types[4] = {
  77                 "NONE", "ASYNC", "ADAPTIVE", "SYNC"
  78         };
  79
  80         list_for_each(p, &subs->fmt_list) {
  81                 struct audioformat *fp;
  82                 snd_pcm_format_t fmt;
  83                 fp = list_entry(p, struct audioformat, list);
  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 & (1uLL << 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 (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH)
 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_substream_status(struct snd_usb_substream *subs, struct snd_info_buffer *buffer)
 119 {
 120         if (subs->running) {
 121                 unsigned int i;
 122                 snd_iprintf(buffer, "  Status: Running\n");
 123                 snd_iprintf(buffer, "    Interface = %d\n", subs->interface);
 124                 snd_iprintf(buffer, "    Altset = %d\n", subs->altset_idx);
 125                 snd_iprintf(buffer, "    URBs = %d [ ", subs->nurbs);
 126                 for (i = 0; i < subs->nurbs; i++)
 127                         snd_iprintf(buffer, "%d ", subs->dataurb[i].packets);
 128                 snd_iprintf(buffer, "]\n");
 129                 snd_iprintf(buffer, "    Packet Size = %d\n", subs->curpacksize);
 130                 snd_iprintf(buffer, "    Momentary freq = %u Hz (%#x.%04x)\n",
 131                             snd_usb_get_speed(subs->dev) == USB_SPEED_FULL
 132                             ? get_full_speed_hz(subs->freqm)
 133                             : get_high_speed_hz(subs->freqm),
 134                             subs->freqm >> 16, subs->freqm & 0xffff);
 135         } else {
 136                 snd_iprintf(buffer, "  Status: Stop\n");
 137         }
 138 }
 139
 140 static void proc_pcm_format_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
 141 {
 142         struct snd_usb_stream *stream = entry->private_data;
 143
 144         snd_iprintf(buffer, "%s : %s\n", stream->chip->card->longname, stream->pcm->name);
 145
 146         if (stream->substream[SNDRV_PCM_STREAM_PLAYBACK].num_formats) {
 147                 snd_iprintf(buffer, "\nPlayback:\n");
 148                 proc_dump_substream_status(&stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer);
 149                 proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer);
 150         }
 151         if (stream->substream[SNDRV_PCM_STREAM_CAPTURE].num_formats) {
 152                 snd_iprintf(buffer, "\nCapture:\n");
 153                 proc_dump_substream_status(&stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer);
 154                 proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer);
 155         }
 156 }
 157
 158 void snd_usb_proc_pcm_format_add(struct snd_usb_stream *stream)
 159 {
 160         struct snd_info_entry *entry;
 161         char name[32];
 162         struct snd_card *card = stream->chip->card;
 163
 164         sprintf(name, "stream%d", stream->pcm_index);
 165         if (!snd_card_proc_new(card, name, &entry))
 166                 snd_info_set_text_ops(entry, stream, proc_pcm_format_read);
 167 }