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Linux/sound/firewire/motu/motu-proc.c

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  1 // SPDX-License-Identifier: GPL-2.0-only
  2 /*
  3  * motu-proc.c - a part of driver for MOTU FireWire series
  4  *
  5  * Copyright (c) 2015-2017 Takashi Sakamoto <o-takashi@sakamocchi.jp>
  6  */
  7 
  8 #include "./motu.h"
  9 
 10 static const char *const clock_names[] = {
 11         [SND_MOTU_CLOCK_SOURCE_INTERNAL] = "Internal",
 12         [SND_MOTU_CLOCK_SOURCE_ADAT_ON_DSUB] = "ADAT on Dsub-9pin interface",
 13         [SND_MOTU_CLOCK_SOURCE_ADAT_ON_OPT] = "ADAT on optical interface",
 14         [SND_MOTU_CLOCK_SOURCE_ADAT_ON_OPT_A] = "ADAT on optical interface A",
 15         [SND_MOTU_CLOCK_SOURCE_ADAT_ON_OPT_B] = "ADAT on optical interface B",
 16         [SND_MOTU_CLOCK_SOURCE_SPDIF_ON_OPT] = "S/PDIF on optical interface",
 17         [SND_MOTU_CLOCK_SOURCE_SPDIF_ON_OPT_A] = "S/PDIF on optical interface A",
 18         [SND_MOTU_CLOCK_SOURCE_SPDIF_ON_OPT_B] = "S/PDIF on optical interface B",
 19         [SND_MOTU_CLOCK_SOURCE_SPDIF_ON_COAX] = "S/PDIF on coaxial interface",
 20         [SND_MOTU_CLOCK_SOURCE_AESEBU_ON_XLR] = "AESEBU on XLR interface",
 21         [SND_MOTU_CLOCK_SOURCE_WORD_ON_BNC] = "Word clock on BNC interface",
 22         [SND_MOTU_CLOCK_SOURCE_SPH] = "Source packet header",
 23         [SND_MOTU_CLOCK_SOURCE_UNKNOWN] = "Unknown",
 24 };
 25 
 26 static void proc_read_clock(struct snd_info_entry *entry,
 27                             struct snd_info_buffer *buffer)
 28 {
 29 
 30         struct snd_motu *motu = entry->private_data;
 31         const struct snd_motu_protocol *const protocol = motu->spec->protocol;
 32         unsigned int rate;
 33         enum snd_motu_clock_source source;
 34 
 35         if (protocol->get_clock_rate(motu, &rate) < 0)
 36                 return;
 37         if (protocol->get_clock_source(motu, &source) < 0)
 38                 return;
 39 
 40         snd_iprintf(buffer, "Rate:\t%d\n", rate);
 41         snd_iprintf(buffer, "Source:\t%s\n", clock_names[source]);
 42 }
 43 
 44 static void proc_read_format(struct snd_info_entry *entry,
 45                              struct snd_info_buffer *buffer)
 46 {
 47         struct snd_motu *motu = entry->private_data;
 48         const struct snd_motu_protocol *const protocol = motu->spec->protocol;
 49         unsigned int mode;
 50         struct snd_motu_packet_format *formats;
 51         int i;
 52 
 53         if (protocol->cache_packet_formats(motu) < 0)
 54                 return;
 55 
 56         snd_iprintf(buffer, "tx:\tmsg\tfixed\tdiffered\n");
 57         for (i = 0; i < SND_MOTU_CLOCK_RATE_COUNT; ++i) {
 58                 mode = i >> 1;
 59 
 60                 formats = &motu->tx_packet_formats;
 61                 snd_iprintf(buffer,
 62                             "%u:\t%u\t%u\t%u\n",
 63                             snd_motu_clock_rates[i],
 64                             formats->msg_chunks,
 65                             formats->fixed_part_pcm_chunks[mode],
 66                             formats->differed_part_pcm_chunks[mode]);
 67         }
 68 
 69         snd_iprintf(buffer, "rx:\tmsg\tfixed\tdiffered\n");
 70         for (i = 0; i < SND_MOTU_CLOCK_RATE_COUNT; ++i) {
 71                 mode = i >> 1;
 72 
 73                 formats = &motu->rx_packet_formats;
 74                 snd_iprintf(buffer,
 75                             "%u:\t%u\t%u\t%u\n",
 76                             snd_motu_clock_rates[i],
 77                             formats->msg_chunks,
 78                             formats->fixed_part_pcm_chunks[mode],
 79                             formats->differed_part_pcm_chunks[mode]);
 80         }
 81 }
 82 
 83 static void add_node(struct snd_motu *motu, struct snd_info_entry *root,
 84                      const char *name,
 85                      void (*op)(struct snd_info_entry *e,
 86                                 struct snd_info_buffer *b))
 87 {
 88         struct snd_info_entry *entry;
 89 
 90         entry = snd_info_create_card_entry(motu->card, name, root);
 91         if (entry)
 92                 snd_info_set_text_ops(entry, motu, op);
 93 }
 94 
 95 void snd_motu_proc_init(struct snd_motu *motu)
 96 {
 97         struct snd_info_entry *root;
 98 
 99         /*
100          * All nodes are automatically removed at snd_card_disconnect(),
101          * by following to link list.
102          */
103         root = snd_info_create_card_entry(motu->card, "firewire",
104                                           motu->card->proc_root);
105         if (root == NULL)
106                 return;
107         root->mode = S_IFDIR | 0555;
108 
109         add_node(motu, root, "clock", proc_read_clock);
110         add_node(motu, root, "format", proc_read_format);
111 }
112 

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