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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 */
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 (!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 (!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 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 
119 static 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 
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, buffer);
145  proc_dump_ep_status(subs, subs->sync_endpoint, buffer);
146  } else {
147  snd_iprintf(buffer, " Status: Stop\n");
148  }
149 }
150 
151 static 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 
169 void 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 
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