sound/firewire/digi00x/digi00x-proc.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * digi00x-proc.c - a part of driver for Digidesign Digi 002/003 family
   4  *
   5  * Copyright (c) 2014-2015 Takashi Sakamoto
   6  */
   7
   8 #include "digi00x.h"
   9
  10 static int get_optical_iface_mode(struct snd_dg00x *dg00x,
  11                                   enum snd_dg00x_optical_mode *mode)
  12 {
  13         __be32 data;
  14         int err;
  15
  16         err = snd_fw_transaction(dg00x->unit, TCODE_READ_QUADLET_REQUEST,
  17                                  DG00X_ADDR_BASE + DG00X_OFFSET_OPT_IFACE_MODE,
  18                                  &data, sizeof(data), 0);
  19         if (err >= 0)
  20                 *mode = be32_to_cpu(data) & 0x01;
  21
  22         return err;
  23 }
  24
  25 static void proc_read_clock(struct snd_info_entry *entry,
  26                             struct snd_info_buffer *buf)
  27 {
  28         static const char *const source_name[] = {
  29                 [SND_DG00X_CLOCK_INTERNAL] = "internal",
  30                 [SND_DG00X_CLOCK_SPDIF] = "s/pdif",
  31                 [SND_DG00X_CLOCK_ADAT] = "adat",
  32                 [SND_DG00X_CLOCK_WORD] = "word clock",
  33         };
  34         static const char *const optical_name[] = {
  35                 [SND_DG00X_OPT_IFACE_MODE_ADAT] = "adat",
  36                 [SND_DG00X_OPT_IFACE_MODE_SPDIF] = "s/pdif",
  37         };
  38         struct snd_dg00x *dg00x = entry->private_data;
  39         enum snd_dg00x_optical_mode mode;
  40         unsigned int rate;
  41         enum snd_dg00x_clock clock;
  42         bool detect;
  43
  44         if (get_optical_iface_mode(dg00x, &mode) < 0)
  45                 return;
  46         if (snd_dg00x_stream_get_local_rate(dg00x, &rate) < 0)
  47                 return;
  48         if (snd_dg00x_stream_get_clock(dg00x, &clock) < 0)
  49                 return;
  50
  51         snd_iprintf(buf, "Optical mode: %s\n", optical_name[mode]);
  52         snd_iprintf(buf, "Sampling Rate: %d\n", rate);
  53         snd_iprintf(buf, "Clock Source: %s\n", source_name[clock]);
  54
  55         if (clock == SND_DG00X_CLOCK_INTERNAL)
  56                 return;
  57
  58         if (snd_dg00x_stream_check_external_clock(dg00x, &detect) < 0)
  59                 return;
  60         snd_iprintf(buf, "External source: %s\n", detect ? "detected" : "not");
  61         if (!detect)
  62                 return;
  63
  64         if (snd_dg00x_stream_get_external_rate(dg00x, &rate) >= 0)
  65                 snd_iprintf(buf, "External sampling rate: %d\n", rate);
  66 }
  67
  68 void snd_dg00x_proc_init(struct snd_dg00x *dg00x)
  69 {
  70         struct snd_info_entry *root, *entry;
  71
  72         /*
  73          * All nodes are automatically removed at snd_card_disconnect(),
  74          * by following to link list.
  75          */
  76         root = snd_info_create_card_entry(dg00x->card, "firewire",
  77                                           dg00x->card->proc_root);
  78         if (root == NULL)
  79                 return;
  80
  81         root->mode = S_IFDIR | 0555;
  82
  83         entry = snd_info_create_card_entry(dg00x->card, "clock", root);
  84         if (entry)
  85                 snd_info_set_text_ops(entry, dg00x, proc_read_clock);
  86 }