// SPDX-License-Identifier: GPL-2.0 // // ASoC Audio Graph Card2 support // // Copyright (C) 2020 Renesas Electronics Corp. // Copyright (C) 2020 Kuninori Morimoto // // based on ${LINUX}/sound/soc/generic/audio-graph-card.c #include #include #include #include #include #include #include #include #include #include #include #include /************************************ daifmt ************************************ ports { format = "left_j"; port@0 { bitclock-master; sample0: endpoint@0 { frame-master; }; sample1: endpoint@1 { format = "i2s"; }; }; ... }; You can set daifmt at ports/port/endpoint. It uses *latest* format, and *share* master settings. In above case, sample0: left_j, bitclock-master, frame-master sample1: i2s, bitclock-master If there was no settings, *Codec* will be bitclock/frame provider as default. see graph_parse_daifmt(). ************************************ Normal Audio-Graph ************************************ CPU <---> Codec sound { compatible = "audio-graph-card2"; links = <&cpu>; }; CPU { cpu: port { bitclock-master; frame-master; cpu_ep: endpoint { remote-endpoint = <&codec_ep>; }; }; }; Codec { port { codec_ep: endpoint { remote-endpoint = <&cpu_ep>; }; }; }; ************************************ Multi-CPU/Codec ************************************ It has connection part (= X) and list part (= y). links indicates connection part of CPU side (= A). +-+ (A) +-+ CPU1 --(y) | | <-(X)--(X)-> | | (y)-- Codec1 CPU2 --(y) | | | | (y)-- Codec2 +-+ +-+ sound { compatible = "audio-graph-card2"; (A) links = <&mcpu>; multi { ports@0 { (X) (A) mcpu: port@0 { mcpu0_ep: endpoint { remote-endpoint = <&mcodec0_ep>; }; }; (y) port@1 { mcpu1_ep: endpoint { remote-endpoint = <&cpu1_ep>; }; }; (y) port@1 { mcpu2_ep: endpoint { remote-endpoint = <&cpu2_ep>; }; }; }; ports@1 { (X) port@0 { mcodec0_ep: endpoint { remote-endpoint = <&mcpu0_ep>; }; }; (y) port@0 { mcodec1_ep: endpoint { remote-endpoint = <&codec1_ep>; }; }; (y) port@1 { mcodec2_ep: endpoint { remote-endpoint = <&codec2_ep>; }; }; }; }; }; CPU { ports { bitclock-master; frame-master; port@0 { cpu1_ep: endpoint { remote-endpoint = <&mcpu1_ep>; }; }; port@1 { cpu2_ep: endpoint { remote-endpoint = <&mcpu2_ep>; }; }; }; }; Codec { ports { port@0 { codec1_ep: endpoint { remote-endpoint = <&mcodec1_ep>; }; }; port@1 { codec2_ep: endpoint { remote-endpoint = <&mcodec2_ep>; }; }; }; }; ************************************ DPCM ************************************ DSP ************ PCM0 <--> * fe0 be0 * <--> DAI0: Codec Headset PCM1 <--> * fe1 be1 * <--> DAI1: Codec Speakers PCM2 <--> * fe2 be2 * <--> DAI2: MODEM PCM3 <--> * fe3 be3 * <--> DAI3: BT * be4 * <--> DAI4: DMIC * be5 * <--> DAI5: FM ************ sound { compatible = "audio-graph-card2"; // indicate routing routing = "xxx Playback", "xxx Playback", "xxx Playback", "xxx Playback", "xxx Playback", "xxx Playback"; // indicate all Front-End, Back-End links = <&fe0, &fe1, ..., &be0, &be1, ...>; dpcm { // Front-End ports@0 { fe0: port@0 { fe0_ep: endpoint { remote-endpoint = <&pcm0_ep>; }; }; fe1: port@1 { fe1_ep: endpoint { remote-endpoint = <&pcm1_ep>; }; }; ... }; // Back-End ports@1 { be0: port@0 { be0_ep: endpoint { remote-endpoint = <&dai0_ep>; }; }; be1: port@1 { be1_ep: endpoint { remote-endpoint = <&dai1_ep>; }; }; ... }; }; }; CPU { ports { bitclock-master; frame-master; port@0 { pcm0_ep: endpoint { remote-endpoint = <&fe0_ep>; }; }; port@1 { pcm1_ep: endpoint { remote-endpoint = <&fe1_ep>; }; }; ... }; }; Codec { ports { port@0 { dai0_ep: endpoint { remote-endpoint = <&be0_ep>; }; }; port@1 { dai1_ep: endpoint { remote-endpoint = <&be1_ep>; }; }; ... }; }; ************************************ Codec to Codec ************************************ +--+ | |<-- Codec0 <- IN | |--> Codec1 -> OUT +--+ sound { compatible = "audio-graph-card2"; routing = "OUT" ,"DAI1 Playback", "DAI0 Capture", "IN"; links = <&c2c>; codec2codec { ports { rate = <48000>; c2c: port@0 { c2cf_ep: endpoint { remote-endpoint = <&codec0_ep>; }; }; port@1 { c2cb_ep: endpoint { remote-endpoint = <&codec1_ep>; }; }; }; }; Codec { ports { port@0 { bitclock-master; frame-master; codec0_ep: endpoint { remote-endpoint = <&c2cf_ep>; }; }; port@1 { codec1_ep: endpoint { remote-endpoint = <&c2cb_ep>; }; }; }; }; */ enum graph_type { GRAPH_NORMAL, GRAPH_DPCM, GRAPH_C2C, GRAPH_MULTI, /* don't use ! Use this only in __graph_get_type() */ }; #define GRAPH_NODENAME_MULTI "multi" #define GRAPH_NODENAME_DPCM "dpcm" #define GRAPH_NODENAME_C2C "codec2codec" #define port_to_endpoint(port) of_get_child_by_name(port, "endpoint") static enum graph_type __graph_get_type(struct device_node *lnk) { struct device_node *np; /* * target { * ports { * => lnk: port@0 { ... }; * port@1 { ... }; * }; * }; */ np = of_get_parent(lnk); if (of_node_name_eq(np, "ports")) np = of_get_parent(np); if (of_node_name_eq(np, GRAPH_NODENAME_MULTI)) return GRAPH_MULTI; if (of_node_name_eq(np, GRAPH_NODENAME_DPCM)) return GRAPH_DPCM; if (of_node_name_eq(np, GRAPH_NODENAME_C2C)) return GRAPH_C2C; return GRAPH_NORMAL; } static enum graph_type graph_get_type(struct asoc_simple_priv *priv, struct device_node *lnk) { enum graph_type type = __graph_get_type(lnk); /* GRAPH_MULTI here means GRAPH_NORMAL */ if (type == GRAPH_MULTI) type = GRAPH_NORMAL; #ifdef DEBUG { struct device *dev = simple_priv_to_dev(priv); const char *str = "Normal"; switch (type) { case GRAPH_DPCM: if (asoc_graph_is_ports0(lnk)) str = "DPCM Front-End"; else str = "DPCM Back-End"; break; case GRAPH_C2C: str = "Codec2Codec"; break; default: break; } dev_dbg(dev, "%pOF (%s)", lnk, str); } #endif return type; } static int graph_lnk_is_multi(struct device_node *lnk) { return __graph_get_type(lnk) == GRAPH_MULTI; } static struct device_node *graph_get_next_multi_ep(struct device_node **port) { struct device_node *ports = of_get_parent(*port); struct device_node *ep = NULL; struct device_node *rep = NULL; /* * multi { * ports { * => lnk: port@0 { ... }; * port@1 { ep { ... = rep0 } }; * port@2 { ep { ... = rep1 } }; * ... * }; * }; * * xxx { * port@0 { rep0 }; * port@1 { rep1 }; * }; */ do { *port = of_get_next_child(ports, *port); if (!*port) break; } while (!of_node_name_eq(*port, "port")); if (*port) { ep = port_to_endpoint(*port); rep = of_graph_get_remote_endpoint(ep); } of_node_put(ep); of_node_put(ports); return rep; } static const struct snd_soc_ops graph_ops = { .startup = asoc_simple_startup, .shutdown = asoc_simple_shutdown, .hw_params = asoc_simple_hw_params, }; static int graph_get_dai_id(struct device_node *ep) { struct device_node *node; struct device_node *endpoint; struct of_endpoint info; int i, id; const u32 *reg; int ret; /* use driver specified DAI ID if exist */ ret = snd_soc_get_dai_id(ep); if (ret != -ENOTSUPP) return ret; /* use endpoint/port reg if exist */ ret = of_graph_parse_endpoint(ep, &info); if (ret == 0) { /* * Because it will count port/endpoint if it doesn't have "reg". * But, we can't judge whether it has "no reg", or "reg = <0>" * only of_graph_parse_endpoint(). * We need to check "reg" property */ if (of_get_property(ep, "reg", NULL)) return info.id; node = of_get_parent(ep); reg = of_get_property(node, "reg", NULL); of_node_put(node); if (reg) return info.port; } node = of_graph_get_port_parent(ep); /* * Non HDMI sound case, counting port/endpoint on its DT * is enough. Let's count it. */ i = 0; id = -1; for_each_endpoint_of_node(node, endpoint) { if (endpoint == ep) id = i; i++; } of_node_put(node); if (id < 0) return -ENODEV; return id; } static int asoc_simple_parse_dai(struct device_node *ep, struct snd_soc_dai_link_component *dlc, int *is_single_link) { struct device_node *node; struct of_phandle_args args; int ret; if (!ep) return 0; node = of_graph_get_port_parent(ep); /* Get dai->name */ args.np = node; args.args[0] = graph_get_dai_id(ep); args.args_count = (of_graph_get_endpoint_count(node) > 1); /* * FIXME * * Here, dlc->dai_name is pointer to CPU/Codec DAI name. * If user unbinded CPU or Codec driver, but not for Sound Card, * dlc->dai_name is keeping unbinded CPU or Codec * driver's pointer. * * If user re-bind CPU or Codec driver again, ALSA SoC will try * to rebind Card via snd_soc_try_rebind_card(), but because of * above reason, it might can't bind Sound Card. * Because Sound Card is pointing to released dai_name pointer. * * To avoid this rebind Card issue, * 1) It needs to alloc memory to keep dai_name eventhough * CPU or Codec driver was unbinded, or * 2) user need to rebind Sound Card everytime * if he unbinded CPU or Codec. */ ret = snd_soc_get_dai_name(&args, &dlc->dai_name); if (ret < 0) return ret; dlc->of_node = node; if (is_single_link) *is_single_link = of_graph_get_endpoint_count(node) == 1; return 0; } static void graph_parse_convert(struct device_node *ep, struct simple_dai_props *props) { struct device_node *port = of_get_parent(ep); struct device_node *ports = of_get_parent(port); struct asoc_simple_data *adata = &props->adata; if (of_node_name_eq(ports, "ports")) asoc_simple_parse_convert(ports, NULL, adata); asoc_simple_parse_convert(port, NULL, adata); asoc_simple_parse_convert(ep, NULL, adata); of_node_put(port); of_node_put(ports); } static void graph_parse_mclk_fs(struct device_node *ep, struct simple_dai_props *props) { struct device_node *port = of_get_parent(ep); struct device_node *ports = of_get_parent(port); if (of_node_name_eq(ports, "ports")) of_property_read_u32(ports, "mclk-fs", &props->mclk_fs); of_property_read_u32(port, "mclk-fs", &props->mclk_fs); of_property_read_u32(ep, "mclk-fs", &props->mclk_fs); of_node_put(port); of_node_put(ports); } static int __graph_parse_node(struct asoc_simple_priv *priv, enum graph_type gtype, struct device_node *ep, struct link_info *li, int is_cpu, int idx) { struct device *dev = simple_priv_to_dev(priv); struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link); struct simple_dai_props *dai_props = simple_priv_to_props(priv, li->link); struct snd_soc_dai_link_component *dlc; struct asoc_simple_dai *dai; int ret, is_single_links = 0; if (is_cpu) { dlc = asoc_link_to_cpu(dai_link, idx); dai = simple_props_to_dai_cpu(dai_props, idx); } else { dlc = asoc_link_to_codec(dai_link, idx); dai = simple_props_to_dai_codec(dai_props, idx); } graph_parse_mclk_fs(ep, dai_props); ret = asoc_simple_parse_dai(ep, dlc, &is_single_links); if (ret < 0) return ret; ret = asoc_simple_parse_tdm(ep, dai); if (ret < 0) return ret; ret = asoc_simple_parse_tdm_width_map(dev, ep, dai); if (ret < 0) return ret; ret = asoc_simple_parse_clk(dev, ep, dai, dlc); if (ret < 0) return ret; /* * set DAI Name */ if (!dai_link->name) { struct snd_soc_dai_link_component *cpus = dlc; struct snd_soc_dai_link_component *codecs = asoc_link_to_codec(dai_link, idx); char *cpu_multi = ""; char *codec_multi = ""; if (dai_link->num_cpus > 1) cpu_multi = "_multi"; if (dai_link->num_codecs > 1) codec_multi = "_multi"; switch (gtype) { case GRAPH_NORMAL: /* run is_cpu only. see audio_graph2_link_normal() */ if (is_cpu) asoc_simple_set_dailink_name(dev, dai_link, "%s%s-%s%s", cpus->dai_name, cpu_multi, codecs->dai_name, codec_multi); break; case GRAPH_DPCM: if (is_cpu) asoc_simple_set_dailink_name(dev, dai_link, "fe.%pOFP.%s%s", cpus->of_node, cpus->dai_name, cpu_multi); else asoc_simple_set_dailink_name(dev, dai_link, "be.%pOFP.%s%s", codecs->of_node, codecs->dai_name, codec_multi); break; case GRAPH_C2C: /* run is_cpu only. see audio_graph2_link_c2c() */ if (is_cpu) asoc_simple_set_dailink_name(dev, dai_link, "c2c.%s%s-%s%s", cpus->dai_name, cpu_multi, codecs->dai_name, codec_multi); break; default: break; } } /* * Check "prefix" from top node * if DPCM-BE case */ if (!is_cpu && gtype == GRAPH_DPCM) { struct snd_soc_dai_link_component *codecs = asoc_link_to_codec(dai_link, idx); struct snd_soc_codec_conf *cconf = simple_props_to_codec_conf(dai_props, idx); struct device_node *rport = of_get_parent(ep); struct device_node *rports = of_get_parent(rport); if (of_node_name_eq(rports, "ports")) snd_soc_of_parse_node_prefix(rports, cconf, codecs->of_node, "prefix"); snd_soc_of_parse_node_prefix(rport, cconf, codecs->of_node, "prefix"); of_node_put(rport); of_node_put(rports); } if (is_cpu) { struct snd_soc_dai_link_component *cpus = dlc; struct snd_soc_dai_link_component *platforms = asoc_link_to_platform(dai_link, idx); asoc_simple_canonicalize_cpu(cpus, is_single_links); asoc_simple_canonicalize_platform(platforms, cpus); } return 0; } static int graph_parse_node(struct asoc_simple_priv *priv, enum graph_type gtype, struct device_node *port, struct link_info *li, int is_cpu) { struct device_node *ep; int ret = 0; if (graph_lnk_is_multi(port)) { int idx; of_node_get(port); for (idx = 0;; idx++) { ep = graph_get_next_multi_ep(&port); if (!ep) break; ret = __graph_parse_node(priv, gtype, ep, li, is_cpu, idx); of_node_put(ep); if (ret < 0) break; } } else { /* Single CPU / Codec */ ep = port_to_endpoint(port); ret = __graph_parse_node(priv, gtype, ep, li, is_cpu, 0); of_node_put(ep); } return ret; } static void graph_parse_daifmt(struct device_node *node, unsigned int *daifmt, unsigned int *bit_frame) { unsigned int fmt; /* * see also above "daifmt" explanation * and samples. */ /* * ports { * (A) * port { * (B) * endpoint { * (C) * }; * }; * }; * }; */ /* * clock_provider: * * It can be judged it is provider * if (A) or (B) or (C) has bitclock-master / frame-master flag. * * use "or" */ *bit_frame |= snd_soc_daifmt_parse_clock_provider_as_bitmap(node, NULL); #define update_daifmt(name) \ if (!(*daifmt & SND_SOC_DAIFMT_##name##_MASK) && \ (fmt & SND_SOC_DAIFMT_##name##_MASK)) \ *daifmt |= fmt & SND_SOC_DAIFMT_##name##_MASK /* * format * * This function is called by (C) -> (B) -> (A) order. * Set if applicable part was not yet set. */ fmt = snd_soc_daifmt_parse_format(node, NULL); update_daifmt(FORMAT); update_daifmt(CLOCK); update_daifmt(INV); } static void graph_link_init(struct asoc_simple_priv *priv, struct device_node *port, struct link_info *li, int is_cpu_node) { struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link); struct device_node *ep; struct device_node *ports; unsigned int daifmt = 0, daiclk = 0; unsigned int bit_frame = 0; if (graph_lnk_is_multi(port)) { of_node_get(port); ep = graph_get_next_multi_ep(&port); port = of_get_parent(ep); } else { ep = port_to_endpoint(port); } ports = of_get_parent(port); /* * ports { * (A) * port { * (B) * endpoint { * (C) * }; * }; * }; * }; */ graph_parse_daifmt(ep, &daifmt, &bit_frame); /* (C) */ graph_parse_daifmt(port, &daifmt, &bit_frame); /* (B) */ if (of_node_name_eq(ports, "ports")) graph_parse_daifmt(ports, &daifmt, &bit_frame); /* (A) */ /* * convert bit_frame * We need to flip clock_provider if it was CPU node, * because it is Codec base. */ daiclk = snd_soc_daifmt_clock_provider_from_bitmap(bit_frame); if (is_cpu_node) daiclk = snd_soc_daifmt_clock_provider_flipped(daiclk); dai_link->dai_fmt = daifmt | daiclk; dai_link->init = asoc_simple_dai_init; dai_link->ops = &graph_ops; if (priv->ops) dai_link->ops = priv->ops; } int audio_graph2_link_normal(struct asoc_simple_priv *priv, struct device_node *lnk, struct link_info *li) { struct device_node *cpu_port = lnk; struct device_node *cpu_ep = port_to_endpoint(cpu_port); struct device_node *codec_port = of_graph_get_remote_port(cpu_ep); int ret; /* * call Codec first. * see * __graph_parse_node() :: DAI Naming */ ret = graph_parse_node(priv, GRAPH_NORMAL, codec_port, li, 0); if (ret < 0) goto err; /* * call CPU, and set DAI Name */ ret = graph_parse_node(priv, GRAPH_NORMAL, cpu_port, li, 1); if (ret < 0) goto err; graph_link_init(priv, cpu_port, li, 1); err: of_node_put(codec_port); of_node_put(cpu_ep); return ret; } EXPORT_SYMBOL_GPL(audio_graph2_link_normal); int audio_graph2_link_dpcm(struct asoc_simple_priv *priv, struct device_node *lnk, struct link_info *li) { struct device_node *ep = port_to_endpoint(lnk); struct device_node *rep = of_graph_get_remote_endpoint(ep); struct device_node *rport = of_graph_get_remote_port(ep); struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link); struct simple_dai_props *dai_props = simple_priv_to_props(priv, li->link); int is_cpu = asoc_graph_is_ports0(lnk); int ret; if (is_cpu) { /* * dpcm { * // Front-End * ports@0 { * => lnk: port@0 { ep: { ... = rep }; }; * ... * }; * // Back-End * ports@0 { * ... * }; * }; * * CPU { * rports: ports { * rport: port@0 { rep: { ... = ep } }; * } * } */ /* * setup CPU here, Codec is already set as dummy. * see * asoc_simple_init_priv() */ dai_link->dynamic = 1; dai_link->dpcm_merged_format = 1; ret = graph_parse_node(priv, GRAPH_DPCM, rport, li, 1); if (ret) goto err; } else { /* * dpcm { * // Front-End * ports@0 { * ... * }; * // Back-End * ports@0 { * => lnk: port@0 { ep: { ... = rep; }; }; * ... * }; * }; * * Codec { * rports: ports { * rport: port@0 { rep: { ... = ep; }; }; * } * } */ /* * setup Codec here, CPU is already set as dummy. * see * asoc_simple_init_priv() */ /* BE settings */ dai_link->no_pcm = 1; dai_link->be_hw_params_fixup = asoc_simple_be_hw_params_fixup; ret = graph_parse_node(priv, GRAPH_DPCM, rport, li, 0); if (ret < 0) goto err; } graph_parse_convert(rep, dai_props); snd_soc_dai_link_set_capabilities(dai_link); graph_link_init(priv, rport, li, is_cpu); err: of_node_put(ep); of_node_put(rep); of_node_put(rport); return ret; } EXPORT_SYMBOL_GPL(audio_graph2_link_dpcm); int audio_graph2_link_c2c(struct asoc_simple_priv *priv, struct device_node *lnk, struct link_info *li) { struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link); struct simple_dai_props *dai_props = simple_priv_to_props(priv, li->link); struct snd_soc_pcm_stream *c2c_conf = dai_props->c2c_conf; struct device_node *port0, *port1, *ports; struct device_node *codec0_port, *codec1_port; struct device_node *ep0, *ep1; u32 val; int ret = -EINVAL; /* * codec2codec { * ports { * rate = <48000>; * => lnk: port@0 { c2c0_ep: { ... = codec0_ep; }; }; * port@1 { c2c1_ep: { ... = codec1_ep; }; }; * }; * }; * * Codec { * ports { * port@0 { codec0_ep: ... }; }; * port@1 { codec1_ep: ... }; }; * }; * }; */ of_node_get(lnk); port0 = lnk; ports = of_get_parent(port0); port1 = of_get_next_child(ports, lnk); if (!of_get_property(ports, "rate", &val)) { struct device *dev = simple_priv_to_dev(priv); dev_err(dev, "Codec2Codec needs rate settings\n"); goto err1; } c2c_conf->formats = SNDRV_PCM_FMTBIT_S32_LE; /* update ME */ c2c_conf->rate_min = c2c_conf->rate_max = val; c2c_conf->channels_min = c2c_conf->channels_max = 2; /* update ME */ dai_link->params = c2c_conf; ep0 = port_to_endpoint(port0); ep1 = port_to_endpoint(port1); codec0_port = of_graph_get_remote_port(ep0); codec1_port = of_graph_get_remote_port(ep1); /* * call Codec first. * see * __graph_parse_node() :: DAI Naming */ ret = graph_parse_node(priv, GRAPH_C2C, codec1_port, li, 0); if (ret < 0) goto err2; /* * call CPU, and set DAI Name */ ret = graph_parse_node(priv, GRAPH_C2C, codec0_port, li, 1); if (ret < 0) goto err2; graph_link_init(priv, codec0_port, li, 1); err2: of_node_put(ep0); of_node_put(ep1); of_node_put(codec0_port); of_node_put(codec1_port); err1: of_node_put(ports); of_node_put(port0); of_node_put(port1); return ret; } EXPORT_SYMBOL_GPL(audio_graph2_link_c2c); static int graph_link(struct asoc_simple_priv *priv, struct graph2_custom_hooks *hooks, enum graph_type gtype, struct device_node *lnk, struct link_info *li) { struct device *dev = simple_priv_to_dev(priv); GRAPH2_CUSTOM func = NULL; int ret = -EINVAL; switch (gtype) { case GRAPH_NORMAL: if (hooks && hooks->custom_normal) func = hooks->custom_normal; else func = audio_graph2_link_normal; break; case GRAPH_DPCM: if (hooks && hooks->custom_dpcm) func = hooks->custom_dpcm; else func = audio_graph2_link_dpcm; break; case GRAPH_C2C: if (hooks && hooks->custom_c2c) func = hooks->custom_c2c; else func = audio_graph2_link_c2c; break; default: break; } if (!func) { dev_err(dev, "non supported gtype (%d)\n", gtype); goto err; } ret = func(priv, lnk, li); if (ret < 0) goto err; li->link++; err: return ret; } static int graph_counter(struct device_node *lnk) { /* * Multi CPU / Codec * * multi { * ports { * => lnk: port@0 { ... }; * port@1 { ... }; * port@2 { ... }; * ... * }; * }; * * ignore first lnk part */ if (graph_lnk_is_multi(lnk)) return of_graph_get_endpoint_count(of_get_parent(lnk)) - 1; /* * Single CPU / Codec */ else return 1; } static int graph_count_normal(struct asoc_simple_priv *priv, struct device_node *lnk, struct link_info *li) { struct device_node *cpu_port = lnk; struct device_node *cpu_ep = port_to_endpoint(cpu_port); struct device_node *codec_port = of_graph_get_remote_port(cpu_ep); /* * CPU { * => lnk: port { endpoint { .. }; }; * }; */ li->num[li->link].cpus = li->num[li->link].platforms = graph_counter(cpu_port); li->num[li->link].codecs = graph_counter(codec_port); of_node_put(cpu_ep); of_node_put(codec_port); return 0; } static int graph_count_dpcm(struct asoc_simple_priv *priv, struct device_node *lnk, struct link_info *li) { struct device_node *ep = port_to_endpoint(lnk); struct device_node *rport = of_graph_get_remote_port(ep); /* * dpcm { * // Front-End * ports@0 { * => lnk: port@0 { endpoint { ... }; }; * ... * }; * // Back-End * ports@1 { * => lnk: port@0 { endpoint { ... }; }; * ... * }; * }; */ if (asoc_graph_is_ports0(lnk)) { li->num[li->link].cpus = graph_counter(rport); /* FE */ li->num[li->link].platforms = graph_counter(rport); } else { li->num[li->link].codecs = graph_counter(rport); /* BE */ } of_node_put(ep); of_node_put(rport); return 0; } static int graph_count_c2c(struct asoc_simple_priv *priv, struct device_node *lnk, struct link_info *li) { struct device_node *ports = of_get_parent(lnk); struct device_node *port0 = lnk; struct device_node *port1 = of_get_next_child(ports, lnk); struct device_node *ep0 = port_to_endpoint(port0); struct device_node *ep1 = port_to_endpoint(port1); struct device_node *codec0 = of_graph_get_remote_port(ep0); struct device_node *codec1 = of_graph_get_remote_port(ep1); of_node_get(lnk); /* * codec2codec { * ports { * => lnk: port@0 { endpoint { ... }; }; * port@1 { endpoint { ... }; }; * }; * }; */ li->num[li->link].cpus = li->num[li->link].platforms = graph_counter(codec0); li->num[li->link].codecs = graph_counter(codec1); li->num[li->link].c2c = 1; of_node_put(ports); of_node_put(port1); of_node_put(ep0); of_node_put(ep1); of_node_put(codec0); of_node_put(codec1); return 0; } static int graph_count(struct asoc_simple_priv *priv, struct graph2_custom_hooks *hooks, enum graph_type gtype, struct device_node *lnk, struct link_info *li) { struct device *dev = simple_priv_to_dev(priv); GRAPH2_CUSTOM func = NULL; int ret = -EINVAL; if (li->link >= SNDRV_MAX_LINKS) { dev_err(dev, "too many links\n"); return ret; } switch (gtype) { case GRAPH_NORMAL: func = graph_count_normal; break; case GRAPH_DPCM: func = graph_count_dpcm; break; case GRAPH_C2C: func = graph_count_c2c; break; default: break; } if (!func) { dev_err(dev, "non supported gtype (%d)\n", gtype); goto err; } ret = func(priv, lnk, li); if (ret < 0) goto err; li->link++; err: return ret; } static int graph_for_each_link(struct asoc_simple_priv *priv, struct graph2_custom_hooks *hooks, struct link_info *li, int (*func)(struct asoc_simple_priv *priv, struct graph2_custom_hooks *hooks, enum graph_type gtype, struct device_node *lnk, struct link_info *li)) { struct of_phandle_iterator it; struct device *dev = simple_priv_to_dev(priv); struct device_node *node = dev->of_node; struct device_node *lnk; enum graph_type gtype; int rc, ret; /* loop for all listed CPU port */ of_for_each_phandle(&it, rc, node, "links", NULL, 0) { lnk = it.node; gtype = graph_get_type(priv, lnk); ret = func(priv, hooks, gtype, lnk, li); if (ret < 0) return ret; } return 0; } int audio_graph2_parse_of(struct asoc_simple_priv *priv, struct device *dev, struct graph2_custom_hooks *hooks) { struct snd_soc_card *card = simple_priv_to_card(priv); struct link_info *li; int ret; li = devm_kzalloc(dev, sizeof(*li), GFP_KERNEL); if (!li) return -ENOMEM; card->probe = asoc_graph_card_probe; card->owner = THIS_MODULE; card->dev = dev; if ((hooks) && (hooks)->hook_pre) { ret = (hooks)->hook_pre(priv); if (ret < 0) goto err; } ret = graph_for_each_link(priv, hooks, li, graph_count); if (!li->link) ret = -EINVAL; if (ret < 0) goto err; ret = asoc_simple_init_priv(priv, li); if (ret < 0) goto err; priv->pa_gpio = devm_gpiod_get_optional(dev, "pa", GPIOD_OUT_LOW); if (IS_ERR(priv->pa_gpio)) { ret = PTR_ERR(priv->pa_gpio); dev_err(dev, "failed to get amplifier gpio: %d\n", ret); goto err; } ret = asoc_simple_parse_widgets(card, NULL); if (ret < 0) goto err; ret = asoc_simple_parse_routing(card, NULL); if (ret < 0) goto err; memset(li, 0, sizeof(*li)); ret = graph_for_each_link(priv, hooks, li, graph_link); if (ret < 0) goto err; ret = asoc_simple_parse_card_name(card, NULL); if (ret < 0) goto err; snd_soc_card_set_drvdata(card, priv); if ((hooks) && (hooks)->hook_post) { ret = (hooks)->hook_post(priv); if (ret < 0) goto err; } asoc_simple_debug_info(priv); ret = devm_snd_soc_register_card(dev, card); err: devm_kfree(dev, li); if (ret < 0) dev_err_probe(dev, ret, "parse error\n"); if (ret == 0) dev_warn(dev, "Audio Graph Card2 is still under Experimental stage\n"); return ret; } EXPORT_SYMBOL_GPL(audio_graph2_parse_of); static int graph_probe(struct platform_device *pdev) { struct asoc_simple_priv *priv; struct device *dev = &pdev->dev; /* Allocate the private data and the DAI link array */ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; return audio_graph2_parse_of(priv, dev, NULL); } static const struct of_device_id graph_of_match[] = { { .compatible = "audio-graph-card2", }, {}, }; MODULE_DEVICE_TABLE(of, graph_of_match); static struct platform_driver graph_card = { .driver = { .name = "asoc-audio-graph-card2", .pm = &snd_soc_pm_ops, .of_match_table = graph_of_match, }, .probe = graph_probe, .remove = asoc_simple_remove, }; module_platform_driver(graph_card); MODULE_ALIAS("platform:asoc-audio-graph-card2"); MODULE_LICENSE("GPL v2"); MODULE_DESCRIPTION("ASoC Audio Graph Card2"); MODULE_AUTHOR("Kuninori Morimoto ");