kernel/sound/firewire/oxfw/oxfw-proc.c

   1 /*
   2  * oxfw_proc.c - a part of driver for OXFW970/971 based devices
   3  *
   4  * Copyright (c) 2014 Takashi Sakamoto
   5  *
   6  * Licensed under the terms of the GNU General Public License, version 2.
   7  */
   8
   9 #include "./oxfw.h"
  10
  11 static void proc_read_formation(struct snd_info_entry *entry,
  12                                 struct snd_info_buffer *buffer)
  13 {
  14         struct snd_oxfw *oxfw = entry->private_data;
  15         struct snd_oxfw_stream_formation formation, curr;
  16         u8 *format;
  17         char flag;
  18         int i, err;
  19
  20         /* Show input. */
  21         err = snd_oxfw_stream_get_current_formation(oxfw,
  22                                                     AVC_GENERAL_PLUG_DIR_IN,
  23                                                     &curr);
  24         if (err < 0)
  25                 return;
  26
  27         snd_iprintf(buffer, "Input Stream to device:\n");
  28         snd_iprintf(buffer, "\tRate\tPCM\tMIDI\n");
  29         for (i = 0; i < SND_OXFW_STREAM_FORMAT_ENTRIES; i++) {
  30                 format = oxfw->rx_stream_formats[i];
  31                 if (format == NULL)
  32                         continue;
  33
  34                 err = snd_oxfw_stream_parse_format(format, &formation);
  35                 if (err < 0)
  36                         continue;
  37
  38                 if (memcmp(&formation, &curr, sizeof(curr)) == 0)
  39                         flag = '*';
  40                 else
  41                         flag = ' ';
  42
  43                 snd_iprintf(buffer, "%c\t%d\t%d\t%d\n", flag,
  44                             formation.rate, formation.pcm, formation.midi);
  45         }
  46
  47         if (!oxfw->has_output)
  48                 return;
  49
  50         /* Show output. */
  51         err = snd_oxfw_stream_get_current_formation(oxfw,
  52                                                     AVC_GENERAL_PLUG_DIR_OUT,
  53                                                     &curr);
  54         if (err < 0)
  55                 return;
  56
  57         snd_iprintf(buffer, "Output Stream from device:\n");
  58         snd_iprintf(buffer, "\tRate\tPCM\tMIDI\n");
  59         for (i = 0; i < SND_OXFW_STREAM_FORMAT_ENTRIES; i++) {
  60                 format = oxfw->tx_stream_formats[i];
  61                 if (format == NULL)
  62                         continue;
  63
  64                 err = snd_oxfw_stream_parse_format(format, &formation);
  65                 if (err < 0)
  66                         continue;
  67
  68                 if (memcmp(&formation, &curr, sizeof(curr)) == 0)
  69                         flag = '*';
  70                 else
  71                         flag = ' ';
  72
  73                 snd_iprintf(buffer, "%c\t%d\t%d\t%d\n", flag,
  74                             formation.rate, formation.pcm, formation.midi);
  75         }
  76 }
  77
  78 static void add_node(struct snd_oxfw *oxfw, struct snd_info_entry *root,
  79                      const char *name,
  80                      void (*op)(struct snd_info_entry *e,
  81                                 struct snd_info_buffer *b))
  82 {
  83         struct snd_info_entry *entry;
  84
  85         entry = snd_info_create_card_entry(oxfw->card, name, root);
  86         if (entry == NULL)
  87                 return;
  88
  89         snd_info_set_text_ops(entry, oxfw, op);
  90         if (snd_info_register(entry) < 0)
  91                 snd_info_free_entry(entry);
  92 }
  93
  94 void snd_oxfw_proc_init(struct snd_oxfw *oxfw)
  95 {
  96         struct snd_info_entry *root;
  97
  98         /*
  99          * All nodes are automatically removed at snd_card_disconnect(),
 100          * by following to link list.
 101          */
 102         root = snd_info_create_card_entry(oxfw->card, "firewire",
 103                                           oxfw->card->proc_root);
 104         if (root == NULL)
 105                 return;
 106         root->mode = S_IFDIR | S_IRUGO | S_IXUGO;
 107         if (snd_info_register(root) < 0) {
 108                 snd_info_free_entry(root);
 109                 return;
 110         }
 111
 112         add_node(oxfw, root, "formation", proc_read_formation);
 113 }