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 
get_optical_iface_mode(struct snd_dg00x * dg00x,enum snd_dg00x_optical_mode * mode)10 static 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 
proc_read_clock(struct snd_info_entry * entry,struct snd_info_buffer * buf)25 static 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 
snd_dg00x_proc_init(struct snd_dg00x * dg00x)68 void 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