sound/soc/sh/rcar/debugfs.c

   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
  17 static 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 }
  39 DEFINE_SHOW_ATTRIBUTE(rsnd_debugfs);
  40
  41 void 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
  56 void 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
  67 int 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 */