xref: /openbmc/linux/sound/firewire/motu/motu-proc.c (revision 9883b385)
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 
proc_read_clock(struct snd_info_entry * entry,struct snd_info_buffer * buffer)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 	unsigned int rate;
32 	enum snd_motu_clock_source source;
33 
34 	if (snd_motu_protocol_get_clock_rate(motu, &rate) < 0)
35 		return;
36 	if (snd_motu_protocol_get_clock_source(motu, &source) < 0)
37 		return;
38 
39 	snd_iprintf(buffer, "Rate:\t%d\n", rate);
40 	snd_iprintf(buffer, "Source:\t%s\n", clock_names[source]);
41 }
42 
proc_read_format(struct snd_info_entry * entry,struct snd_info_buffer * buffer)43 static void proc_read_format(struct snd_info_entry *entry,
44 			     struct snd_info_buffer *buffer)
45 {
46 	struct snd_motu *motu = entry->private_data;
47 	unsigned int mode;
48 	struct snd_motu_packet_format *formats;
49 	int i;
50 
51 	if (snd_motu_protocol_cache_packet_formats(motu) < 0)
52 		return;
53 
54 	snd_iprintf(buffer, "tx:\tmsg\tfixed\ttotal\n");
55 	for (i = 0; i < SND_MOTU_CLOCK_RATE_COUNT; ++i) {
56 		mode = i >> 1;
57 
58 		formats = &motu->tx_packet_formats;
59 		snd_iprintf(buffer,
60 			    "%u:\t%u\t%u\t%u\n",
61 			    snd_motu_clock_rates[i],
62 			    formats->msg_chunks,
63 			    motu->spec->tx_fixed_pcm_chunks[mode],
64 			    formats->pcm_chunks[mode]);
65 	}
66 
67 	snd_iprintf(buffer, "rx:\tmsg\tfixed\ttotal\n");
68 	for (i = 0; i < SND_MOTU_CLOCK_RATE_COUNT; ++i) {
69 		mode = i >> 1;
70 
71 		formats = &motu->rx_packet_formats;
72 		snd_iprintf(buffer,
73 			    "%u:\t%u\t%u\t%u\n",
74 			    snd_motu_clock_rates[i],
75 			    formats->msg_chunks,
76 			    motu->spec->rx_fixed_pcm_chunks[mode],
77 			    formats->pcm_chunks[mode]);
78 	}
79 }
80 
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))81 static void add_node(struct snd_motu *motu, struct snd_info_entry *root,
82 		     const char *name,
83 		     void (*op)(struct snd_info_entry *e,
84 				struct snd_info_buffer *b))
85 {
86 	struct snd_info_entry *entry;
87 
88 	entry = snd_info_create_card_entry(motu->card, name, root);
89 	if (entry)
90 		snd_info_set_text_ops(entry, motu, op);
91 }
92 
snd_motu_proc_init(struct snd_motu * motu)93 void snd_motu_proc_init(struct snd_motu *motu)
94 {
95 	struct snd_info_entry *root;
96 
97 	/*
98 	 * All nodes are automatically removed at snd_card_disconnect(),
99 	 * by following to link list.
100 	 */
101 	root = snd_info_create_card_entry(motu->card, "firewire",
102 					  motu->card->proc_root);
103 	if (root == NULL)
104 		return;
105 	root->mode = S_IFDIR | 0555;
106 
107 	add_node(motu, root, "clock", proc_read_clock);
108 	add_node(motu, root, "format", proc_read_format);
109 }
110