1// SPDX-License-Identifier: GPL-2.0
 2//
 3// // Renesas R-Car debugfs support
 4//
 5// Copyright (c) 2021 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
 6//
 7//	> mount -t debugfs none /sys/kernel/debug
 8//	> cd /sys/kernel/debug/asoc/rcar-sound/ec500000.sound/rdai{N}/
 9//	> cat playback/xxx
10//	> cat capture/xxx
11//
12#ifdef CONFIG_DEBUG_FS
13
14#include <linux/debugfs.h>
15#include "rsnd.h"
16
17static int rsnd_debugfs_show(struct seq_file *m, void *v)
18{
19	struct rsnd_dai_stream *io = m->private;
20	struct rsnd_mod *mod = rsnd_io_to_mod_ssi(io);
21	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
22	int i;
23
24	/* adg is out of mods */
25	rsnd_adg_clk_dbg_info(priv, m);
26
27	for_each_rsnd_mod(i, mod, io) {
28		u32 *status = mod->ops->get_status(mod, io, mod->type);
29
30		seq_printf(m, "name: %s\n", rsnd_mod_name(mod));
31		seq_printf(m, "status: %08x\n", *status);
32
33		if (mod->ops->debug_info)
34			mod->ops->debug_info(m, io, mod);
35	}
36
37	return 0;
38}
39DEFINE_SHOW_ATTRIBUTE(rsnd_debugfs);
40
41void rsnd_debugfs_reg_show(struct seq_file *m, phys_addr_t _addr,
42			   void __iomem *base, int offset, int size)
43{
44	int i, j;
45
46	for (i = 0; i < size; i += 0x10) {
47		phys_addr_t addr = _addr + offset + i;
48
49		seq_printf(m, "%pa:", &addr);
50		for (j = 0; j < 0x10; j += 0x4)
51			seq_printf(m, " %08x", __raw_readl(base + offset + i + j));
52		seq_puts(m, "\n");
53	}
54}
55
56void rsnd_debugfs_mod_reg_show(struct seq_file *m, struct rsnd_mod *mod,
57			       int reg_id, int offset, int size)
58{
59	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
60
61	rsnd_debugfs_reg_show(m,
62			      rsnd_gen_get_phy_addr(priv, reg_id),
63			      rsnd_gen_get_base_addr(priv, reg_id),
64			      offset, size);
65}
66
67int rsnd_debugfs_probe(struct snd_soc_component *component)
68{
69	struct rsnd_priv *priv = dev_get_drvdata(component->dev);
70	struct rsnd_dai *rdai;
71	struct dentry *dir;
72	char name[64];
73	int i;
74
75	/* Gen1 is not supported */
76	if (rsnd_is_gen1(priv))
77		return 0;
78
79	for_each_rsnd_dai(rdai, priv, i) {
80		/*
81		 * created debugfs will be automatically
82		 * removed, nothing to do for _remove.
83		 * see
84		 *	soc_cleanup_component_debugfs()
85		 */
86		snprintf(name, sizeof(name), "rdai%d", i);
87		dir = debugfs_create_dir(name, component->debugfs_root);
88
89		debugfs_create_file("playback", 0444, dir, &rdai->playback, &rsnd_debugfs_fops);
90		debugfs_create_file("capture",  0444, dir, &rdai->capture,  &rsnd_debugfs_fops);
91	}
92
93	return 0;
94}
95
96#endif /* CONFIG_DEBUG_FS */