Quelle  motu-proc.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0-only
/*
 * motu-proc.c - a part of driver for MOTU FireWire series
 *
 * Copyright (c) 2015-2017 Takashi Sakamoto <o-takashi@sakamocchi.jp>
 */

#include "./motu.h"

static const char *const clock_names[] = {
 [SND_MOTU_CLOCK_SOURCE_INTERNAL] = "Internal",
 [SND_MOTU_CLOCK_SOURCE_ADAT_ON_DSUB] = "ADAT on Dsub-9pin interface",
 [SND_MOTU_CLOCK_SOURCE_ADAT_ON_OPT] = "ADAT on optical interface",
 [SND_MOTU_CLOCK_SOURCE_ADAT_ON_OPT_A] = "ADAT on optical interface A",
 [SND_MOTU_CLOCK_SOURCE_ADAT_ON_OPT_B] = "ADAT on optical interface B",
 [SND_MOTU_CLOCK_SOURCE_SPDIF_ON_OPT] = "S/PDIF on optical interface",
 [SND_MOTU_CLOCK_SOURCE_SPDIF_ON_OPT_A] = "S/PDIF on optical interface A",
 [SND_MOTU_CLOCK_SOURCE_SPDIF_ON_OPT_B] = "S/PDIF on optical interface B",
 [SND_MOTU_CLOCK_SOURCE_SPDIF_ON_COAX] = "S/PDIF on coaxial interface",
 [SND_MOTU_CLOCK_SOURCE_AESEBU_ON_XLR] = "AESEBU on XLR interface",
 [SND_MOTU_CLOCK_SOURCE_WORD_ON_BNC] = "Word clock on BNC interface",
 [SND_MOTU_CLOCK_SOURCE_SPH] = "Source packet header",
 [SND_MOTU_CLOCK_SOURCE_UNKNOWN] = "Unknown",
};

static void proc_read_clock(struct snd_info_entry *entry,
       struct snd_info_buffer *buffer)
{

 struct snd_motu *motu = entry->private_data;
 unsigned int rate;
 enum snd_motu_clock_source source;

 if (snd_motu_protocol_get_clock_rate(motu, &rate) < 0)
  return;
 if (snd_motu_protocol_get_clock_source(motu, &source) < 0)
  return;

 snd_iprintf(buffer, "Rate:\t%d\n", rate);
 snd_iprintf(buffer, "Source:\t%s\n", clock_names[source]);
}

static void proc_read_format(struct snd_info_entry *entry,
        struct snd_info_buffer *buffer)
{
 struct snd_motu *motu = entry->private_data;
 unsigned int mode;
 struct snd_motu_packet_format *formats;
 int i;

 if (snd_motu_protocol_cache_packet_formats(motu) < 0)
  return;

 snd_iprintf(buffer, "tx:\tmsg\tfixed\ttotal\n");
 for (i = 0; i < SND_MOTU_CLOCK_RATE_COUNT; ++i) {
  mode = i >> 1;

  formats = &motu->tx_packet_formats;
  snd_iprintf(buffer,
       "%u:\t%u\t%u\t%u\n",
       snd_motu_clock_rates[i],
       formats->msg_chunks,
       motu->spec->tx_fixed_pcm_chunks[mode],
       formats->pcm_chunks[mode]);
 }

 snd_iprintf(buffer, "rx:\tmsg\tfixed\ttotal\n");
 for (i = 0; i < SND_MOTU_CLOCK_RATE_COUNT; ++i) {
  mode = i >> 1;

  formats = &motu->rx_packet_formats;
  snd_iprintf(buffer,
       "%u:\t%u\t%u\t%u\n",
       snd_motu_clock_rates[i],
       formats->msg_chunks,
       motu->spec->rx_fixed_pcm_chunks[mode],
       formats->pcm_chunks[mode]);
 }
}

static void add_node(struct snd_motu *motu, struct snd_info_entry *root,
       const char *name,
       void (*op)(struct snd_info_entry *e,
    struct snd_info_buffer *b))
{
 struct snd_info_entry *entry;

 entry = snd_info_create_card_entry(motu->card, name, root);
 if (entry)
  snd_info_set_text_ops(entry, motu, op);
}

void snd_motu_proc_init(struct snd_motu *motu)
{
 struct snd_info_entry *root;

 /*
 * All nodes are automatically removed at snd_card_disconnect(),
 * by following to link list.
 */
 root = snd_info_create_card_entry(motu->card, "firewire",
       motu->card->proc_root);
 if (root == NULL)
  return;
 root->mode = S_IFDIR | 0555;

 add_node(motu, root, "clock", proc_read_clock);
 add_node(motu, root, "format", proc_read_format);
}