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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/sound/firewire/motu/motu-proc.c
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// SPDX-License-Identifier: GPL-2.0-only

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/*

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 * motu-proc.c - a part of driver for MOTU FireWire series

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 *

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 * Copyright (c) 2015-2017 Takashi Sakamoto <[email protected]>

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 */

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#include "./motu.h"

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static const char *const clock_names[] = {

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	[SND_MOTU_CLOCK_SOURCE_INTERNAL] = "Internal",

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	[SND_MOTU_CLOCK_SOURCE_ADAT_ON_DSUB] = "ADAT on Dsub-9pin interface",

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	[SND_MOTU_CLOCK_SOURCE_ADAT_ON_OPT] = "ADAT on optical interface",

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	[SND_MOTU_CLOCK_SOURCE_ADAT_ON_OPT_A] = "ADAT on optical interface A",

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	[SND_MOTU_CLOCK_SOURCE_ADAT_ON_OPT_B] = "ADAT on optical interface B",

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	[SND_MOTU_CLOCK_SOURCE_SPDIF_ON_OPT] = "S/PDIF on optical interface",

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	[SND_MOTU_CLOCK_SOURCE_SPDIF_ON_OPT_A] = "S/PDIF on optical interface A",

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	[SND_MOTU_CLOCK_SOURCE_SPDIF_ON_OPT_B] = "S/PDIF on optical interface B",

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	[SND_MOTU_CLOCK_SOURCE_SPDIF_ON_COAX] = "S/PDIF on coaxial interface",

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	[SND_MOTU_CLOCK_SOURCE_AESEBU_ON_XLR] = "AESEBU on XLR interface",

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	[SND_MOTU_CLOCK_SOURCE_WORD_ON_BNC] = "Word clock on BNC interface",

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	[SND_MOTU_CLOCK_SOURCE_SPH] = "Source packet header",

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	[SND_MOTU_CLOCK_SOURCE_UNKNOWN] = "Unknown",

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};

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static void proc_read_clock(struct snd_info_entry *entry,

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			    struct snd_info_buffer *buffer)

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{

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	struct snd_motu *motu = entry->private_data;

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	unsigned int rate;

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	enum snd_motu_clock_source source;

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	if (snd_motu_protocol_get_clock_rate(motu, &rate) < 0)

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		return;

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	if (snd_motu_protocol_get_clock_source(motu, &source) < 0)

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		return;

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	snd_iprintf(buffer, "Rate:\t%d\n", rate);

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

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}

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static void proc_read_format(struct snd_info_entry *entry,

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			     struct snd_info_buffer *buffer)

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{

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	struct snd_motu *motu = entry->private_data;

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	unsigned int mode;

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	struct snd_motu_packet_format *formats;

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	int i;

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	if (snd_motu_protocol_cache_packet_formats(motu) < 0)

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		return;

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	snd_iprintf(buffer, "tx:\tmsg\tfixed\ttotal\n");

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	for (i = 0; i < SND_MOTU_CLOCK_RATE_COUNT; ++i) {

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		mode = i >> 1;

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		formats = &motu->tx_packet_formats;

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		snd_iprintf(buffer,

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			    "%u:\t%u\t%u\t%u\n",

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			    snd_motu_clock_rates[i],

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			    formats->msg_chunks,

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			    motu->spec->tx_fixed_pcm_chunks[mode],

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			    formats->pcm_chunks[mode]);

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	}

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	snd_iprintf(buffer, "rx:\tmsg\tfixed\ttotal\n");

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	for (i = 0; i < SND_MOTU_CLOCK_RATE_COUNT; ++i) {

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		mode = i >> 1;

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		formats = &motu->rx_packet_formats;

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		snd_iprintf(buffer,

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			    "%u:\t%u\t%u\t%u\n",

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			    snd_motu_clock_rates[i],

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			    formats->msg_chunks,

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			    motu->spec->rx_fixed_pcm_chunks[mode],

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			    formats->pcm_chunks[mode]);

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	}

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}

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static void add_node(struct snd_motu *motu, struct snd_info_entry *root,

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		     const char *name,

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		     void (*op)(struct snd_info_entry *e,

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				struct snd_info_buffer *b))

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{

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	struct snd_info_entry *entry;

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	entry = snd_info_create_card_entry(motu->card, name, root);

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	if (entry)

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		snd_info_set_text_ops(entry, motu, op);

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}

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void snd_motu_proc_init(struct snd_motu *motu)

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{

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	struct snd_info_entry *root;

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	/*

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	 * All nodes are automatically removed at snd_card_disconnect(),

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	 * by following to link list.

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	 */

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	root = snd_info_create_card_entry(motu->card, "firewire",

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					  motu->card->proc_root);

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	if (root == NULL)

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		return;

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	root->mode = S_IFDIR | 0555;

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	add_node(motu, root, "clock", proc_read_clock);

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	add_node(motu, root, "format", proc_read_format);

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}

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