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ALSA: fireface: add proc node to help debugging

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Drivers can retrieve the state and configuration of clock by read
transactions.

This commit allows protocol abstraction layer to to dump the
information for debugging, via proc interface.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Sakamoto 2017-03-31 22:06:05 +09:00 committed by Takashi Iwai
parent ff2c293efa
commit d3fc7aac11
4 changed files with 68 additions and 1 deletions
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2
sound/firewire/fireface/Makefile
View file

@ -1,2 +1,2 @@
snd-fireface-objs := ff.o ff-transaction.o ff-midi.o
snd-fireface-objs := ff.o ff-transaction.o ff-midi.o ff-proc.o
obj-$(CONFIG_SND_FIREFACE) += snd-fireface.o

63
sound/firewire/fireface/ff-proc.c Normal file
View file

@ -0,0 +1,63 @@
/*
* ff-proc.c - a part of driver for RME Fireface series
*
* Copyright (c) 2015-2017 Takashi Sakamoto
*
* Licensed under the terms of the GNU General Public License, version 2.
*/
#include "./ff.h"
static void proc_dump_clock_config(struct snd_info_entry *entry,
struct snd_info_buffer *buffer)
{
struct snd_ff *ff = entry->private_data;
ff->spec->protocol->dump_clock_config(ff, buffer);
}
static void proc_dump_sync_status(struct snd_info_entry *entry,
struct snd_info_buffer *buffer)
{
struct snd_ff *ff = entry->private_data;
ff->spec->protocol->dump_sync_status(ff, buffer);
}
static void add_node(struct snd_ff *ff, struct snd_info_entry *root,
const char *name,
void (*op)(struct snd_info_entry *e,
struct snd_info_buffer *b))
{
struct snd_info_entry *entry;
entry = snd_info_create_card_entry(ff->card, name, root);
if (entry == NULL)
return;
snd_info_set_text_ops(entry, ff, op);
if (snd_info_register(entry) < 0)
snd_info_free_entry(entry);
}
void snd_ff_proc_init(struct snd_ff *ff)
{
struct snd_info_entry *root;
/*
* All nodes are automatically removed at snd_card_disconnect(),
* by following to link list.
*/
root = snd_info_create_card_entry(ff->card, "firewire",
ff->card->proc_root);
if (root == NULL)
return;
root->mode = S_IFDIR | S_IRUGO | S_IXUGO;
if (snd_info_register(root) < 0) {
snd_info_free_entry(root);
return;
}
add_node(ff, root, "clock-config", proc_dump_clock_config);
add_node(ff, root, "sync-status", proc_dump_sync_status);
}

2
sound/firewire/fireface/ff.c
View file

@ -61,6 +61,8 @@ static void do_registration(struct work_struct *work)
name_card(ff);
snd_ff_proc_init(ff);
err = snd_ff_create_midi_devices(ff);
if (err < 0)
goto error;

2
sound/firewire/fireface/ff.h
View file

@ -99,6 +99,8 @@ int snd_ff_transaction_register(struct snd_ff *ff);
int snd_ff_transaction_reregister(struct snd_ff *ff);
void snd_ff_transaction_unregister(struct snd_ff *ff);
void snd_ff_proc_init(struct snd_ff *ff);
int snd_ff_create_midi_devices(struct snd_ff *ff);
#endif