LXR linux/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
  10static 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
  25static 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
  68void 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}
  87