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// SPDX-License-Identifier: GPL-2.0 // // // Renesas R-Car debugfs support // // Copyright (c) 2021 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> // // > mount -t debugfs none /sys/kernel/debug // > cd /sys/kernel/debug/asoc/rcar-sound/ec500000.sound/rdai{N}/ // > cat playback/xxx // > cat capture/xxx // #ifdef CONFIG_DEBUG_FS #include <linux/debugfs.h> #include "rsnd.h" static int rsnd_debugfs_show(struct seq_file *m, void *v) { struct rsnd_dai_stream *io = m->private; struct rsnd_mod *mod = rsnd_io_to_mod_ssi(io); struct rsnd_priv *priv = rsnd_mod_to_priv(mod); int i; /* adg is out of mods */ rsnd_adg_clk_dbg_info(priv, m); for_each_rsnd_mod(i, mod, io) { u32 *status = mod->ops->get_status(mod, io, mod->type); seq_printf(m, "name: %s\n", rsnd_mod_name(mod)); seq_printf(m, "status: %08x\n", *status); if (mod->ops->debug_info) mod->ops->debug_info(m, io, mod); } return 0; } DEFINE_SHOW_ATTRIBUTE(rsnd_debugfs); void rsnd_debugfs_reg_show(struct seq_file *m, phys_addr_t _addr, void __iomem *base, int offset, int size) { int i, j; for (i = 0; i < size; i += 0x10) { phys_addr_t addr = _addr + offset + i; seq_printf(m, "%pa:", &addr); for (j = 0; j < 0x10; j += 0x4) seq_printf(m, " %08x", __raw_readl(base + offset + i + j)); seq_puts(m, "\n"); } } void rsnd_debugfs_mod_reg_show(struct seq_file *m, struct rsnd_mod *mod, int reg_id, int offset, int size) { struct rsnd_priv *priv = rsnd_mod_to_priv(mod); rsnd_debugfs_reg_show(m, rsnd_gen_get_phy_addr(priv, reg_id), rsnd_gen_get_base_addr(priv, reg_id), offset, size); } int rsnd_debugfs_probe(struct snd_soc_component *component) { struct rsnd_priv *priv = dev_get_drvdata(component->dev); struct rsnd_dai *rdai; struct dentry *dir; char name[64]; int i; /* Gen1 is not supported */ if (rsnd_is_gen1(priv)) return 0; for_each_rsnd_dai(rdai, priv, i) { /* * created debugfs will be automatically * removed, nothing to do for _remove. * see * soc_cleanup_component_debugfs() */ snprintf(name, sizeof(name), "rdai%d", i); dir = debugfs_create_dir(name, component->debugfs_root); debugfs_create_file("playback", 0444, dir, &rdai->playback, &rsnd_debugfs_fops); debugfs_create_file("capture", 0444, dir, &rdai->capture, &rsnd_debugfs_fops); } return 0; } #endif /* CONFIG_DEBUG_FS */ |