LXR linux/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
  11static 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
  26static 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
  69void 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}
 100