sound/firewire/digi00x/digi00x-proc.c

   1 /*
   2  * digi00x-proc.c - a part of driver for Digidesign Digi 002/003 family
   3  *
   4  * Copyright (c) 2014-2015 Takashi Sakamoto
   5  *
   6  * Licensed under the terms of the GNU General Public License, version 2.
   7  */
   8
   9 #include "digi00x.h"
  10
  11 static int get_optical_iface_mode(struct snd_dg00x *dg00x,
  12                                   enum snd_dg00x_optical_mode *mode)
  13 {
  14         __be32 data;
  15         int err;
  16
  17         err = snd_fw_transaction(dg00x->unit, TCODE_READ_QUADLET_REQUEST,
  18                                  DG00X_ADDR_BASE + DG00X_OFFSET_OPT_IFACE_MODE,
  19                                  &data, sizeof(data), 0);
  20         if (err >= 0)
  21                 *mode = be32_to_cpu(data) & 0x01;
  22
  23         return err;
  24 }
  25
  26 static void proc_read_clock(struct snd_info_entry *entry,
  27                             struct snd_info_buffer *buf)
  28 {
  29         static const char *const source_name[] = {
  30                 [SND_DG00X_CLOCK_INTERNAL] = "internal",
  31                 [SND_DG00X_CLOCK_SPDIF] = "s/pdif",
  32                 [SND_DG00X_CLOCK_ADAT] = "adat",
  33                 [SND_DG00X_CLOCK_WORD] = "word clock",
  34         };
  35         static const char *const optical_name[] = {
  36                 [SND_DG00X_OPT_IFACE_MODE_ADAT] = "adat",
  37                 [SND_DG00X_OPT_IFACE_MODE_SPDIF] = "s/pdif",
  38         };
  39         struct snd_dg00x *dg00x = entry->private_data;
  40         enum snd_dg00x_optical_mode mode;
  41         unsigned int rate;
  42         enum snd_dg00x_clock clock;
  43         bool detect;
  44
  45         if (get_optical_iface_mode(dg00x, &mode) < 0)
  46                 return;
  47         if (snd_dg00x_stream_get_local_rate(dg00x, &rate) < 0)
  48                 return;
  49         if (snd_dg00x_stream_get_clock(dg00x, &clock) < 0)
  50                 return;
  51
  52         snd_iprintf(buf, "Optical mode: %s\n", optical_name[mode]);
  53         snd_iprintf(buf, "Sampling Rate: %d\n", rate);
  54         snd_iprintf(buf, "Clock Source: %s\n", source_name[clock]);
  55
  56         if (clock == SND_DG00X_CLOCK_INTERNAL)
  57                 return;
  58
  59         if (snd_dg00x_stream_check_external_clock(dg00x, &detect) < 0)
  60                 return;
  61         snd_iprintf(buf, "External source: %s\n", detect ? "detected" : "not");
  62         if (!detect)
  63                 return;
  64
  65         if (snd_dg00x_stream_get_external_rate(dg00x, &rate) >= 0)
  66                 snd_iprintf(buf, "External sampling rate: %d\n", rate);
  67 }
  68
  69 void snd_dg00x_proc_init(struct snd_dg00x *dg00x)
  70 {
  71         struct snd_info_entry *root, *entry;
  72
  73         /*
  74          * All nodes are automatically removed at snd_card_disconnect(),
  75          * by following to link list.
  76          */
  77         root = snd_info_create_card_entry(dg00x->card, "firewire",
  78                                           dg00x->card->proc_root);
  79         if (root == NULL)
  80                 return;
  81
  82         root->mode = S_IFDIR | S_IRUGO | S_IXUGO;
  83         if (snd_info_register(root) < 0) {
  84                 snd_info_free_entry(root);
  85                 return;
  86         }
  87
  88         entry = snd_info_create_card_entry(dg00x->card, "clock", root);
  89         if (entry == NULL) {
  90                 snd_info_free_entry(root);
  91                 return;
  92         }
  93
  94         snd_info_set_text_ops(entry, dg00x, proc_read_clock);
  95         if (snd_info_register(entry) < 0) {
  96                 snd_info_free_entry(entry);
  97                 snd_info_free_entry(root);
  98         }
  99 }