Quelle  digi00x-proc.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0-only
/*
 * digi00x-proc.c - a part of driver for Digidesign Digi 002/003 family
 *
 * Copyright (c) 2014-2015 Takashi Sakamoto
 */

#include "digi00x.h"

static int get_optical_iface_mode(struct snd_dg00x *dg00x,
      enum snd_dg00x_optical_mode *mode)
{
 __be32 data;
 int err;

 err = snd_fw_transaction(dg00x->unit, TCODE_READ_QUADLET_REQUEST,
     DG00X_ADDR_BASE + DG00X_OFFSET_OPT_IFACE_MODE,
     &data, sizeof(data), 0);
 if (err >= 0)
  *mode = be32_to_cpu(data) & 0x01;

 return err;
}

static void proc_read_clock(struct snd_info_entry *entry,
       struct snd_info_buffer *buf)
{
 static const char *const source_name[] = {
  [SND_DG00X_CLOCK_INTERNAL] = "internal",
  [SND_DG00X_CLOCK_SPDIF] = "s/pdif",
  [SND_DG00X_CLOCK_ADAT] = "adat",
  [SND_DG00X_CLOCK_WORD] = "word clock",
 };
 static const char *const optical_name[] = {
  [SND_DG00X_OPT_IFACE_MODE_ADAT] = "adat",
  [SND_DG00X_OPT_IFACE_MODE_SPDIF] = "s/pdif",
 };
 struct snd_dg00x *dg00x = entry->private_data;
 enum snd_dg00x_optical_mode mode;
 unsigned int rate;
 enum snd_dg00x_clock clock;
 bool detect;

 if (get_optical_iface_mode(dg00x, &mode) < 0)
  return;
 if (snd_dg00x_stream_get_local_rate(dg00x, &rate) < 0)
  return;
 if (snd_dg00x_stream_get_clock(dg00x, &clock) < 0)
  return;

 snd_iprintf(buf, "Optical mode: %s\n", optical_name[mode]);
 snd_iprintf(buf, "Sampling Rate: %d\n", rate);
 snd_iprintf(buf, "Clock Source: %s\n", source_name[clock]);

 if (clock == SND_DG00X_CLOCK_INTERNAL)
  return;

 if (snd_dg00x_stream_check_external_clock(dg00x, &detect) < 0)
  return;
 snd_iprintf(buf, "External source: %s\n", detect ? "detected" : "not");
 if (!detect)
  return;

 if (snd_dg00x_stream_get_external_rate(dg00x, &rate) >= 0)
  snd_iprintf(buf, "External sampling rate: %d\n", rate);
}

void snd_dg00x_proc_init(struct snd_dg00x *dg00x)
{
 struct snd_info_entry *root, *entry;

 /*
  * All nodes are automatically removed at snd_card_disconnect(),
  * by following to link list.
 */
 root = snd_info_create_card_entry(dg00x->card, "firewire",
       dg00x->card->proc_root);
 if (root == NULL)
  return;

 root->mode = S_IFDIR | 0555;

 entry = snd_info_create_card_entry(dg00x->card, "clock", root);
 if (entry)
  snd_info_set_text_ops(entry, dg00x, proc_read_clock);
}