1 // SPDX-License-Identifier: GPL-2.0 2 // 3 // Loongson ASoC Audio Machine driver 4 // 5 // Copyright (C) 2023-2026 Loongson Technology Corporation Limited 6 // Author: Yingkun Meng <mengyingkun@loongson.cn> 7 // Binbin Zhou <zhoubinbin@loongson.cn> 8 // 9 10 #include <linux/acpi.h> 11 #include <linux/gpio/consumer.h> 12 #include <linux/module.h> 13 #include <linux/pci.h> 14 #include <sound/jack.h> 15 #include <sound/pcm_params.h> 16 #include <sound/soc.h> 17 #include <sound/soc-acpi.h> 18 19 static char codec_name[SND_ACPI_I2C_ID_LEN]; 20 21 struct loongson_card_data { 22 struct snd_soc_card snd_card; 23 unsigned int mclk_fs; 24 struct gpio_desc *gpiod_hp_det; 25 struct gpio_desc *gpiod_hp_ctl; 26 struct gpio_desc *gpiod_spkr_en; 27 const struct loongson_card_config *cfg; 28 }; 29 30 struct loongson_card_config { 31 unsigned int fmt; 32 bool add_hp_jack; 33 bool add_dapm_widgets; 34 bool add_dapm_routes; 35 }; 36 37 static const struct loongson_card_config ls2k1000_card_config = { 38 .fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_IB_NF | SND_SOC_DAIFMT_CBC_CFC, 39 .add_hp_jack = false, 40 .add_dapm_widgets = false, 41 .add_dapm_routes = false, 42 }; 43 44 static const struct loongson_card_config ls2k0300_forever_pi_card_config = { 45 .fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBC_CFC, 46 .add_hp_jack = false, 47 .add_dapm_widgets = false, 48 .add_dapm_routes = false, 49 }; 50 51 static const struct loongson_card_config ls2k0300_dl2k0300b_card_config = { 52 .fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBC_CFC, 53 .add_hp_jack = true, 54 .add_dapm_widgets = true, 55 .add_dapm_routes = true, 56 }; 57 58 static int loongson_asoc_machine_event(struct snd_soc_dapm_widget *w, 59 struct snd_kcontrol *k, int event) 60 { 61 struct snd_soc_card *card = snd_soc_dapm_to_card(w->dapm); 62 struct loongson_card_data *priv = snd_soc_card_get_drvdata(card); 63 64 if (!snd_soc_dapm_widget_name_cmp(w, "Speaker")) 65 gpiod_set_value_cansleep(priv->gpiod_spkr_en, 66 SND_SOC_DAPM_EVENT_ON(event)); 67 68 if (!snd_soc_dapm_widget_name_cmp(w, "Headphone")) 69 gpiod_set_value_cansleep(priv->gpiod_hp_ctl, 70 SND_SOC_DAPM_EVENT_ON(event)); 71 72 return 0; 73 } 74 75 static const struct snd_soc_dapm_widget loongson_asoc_dapm_widgets[] = { 76 SND_SOC_DAPM_HP("Headphone", loongson_asoc_machine_event), 77 SND_SOC_DAPM_SPK("Speaker", loongson_asoc_machine_event), 78 }; 79 80 /* Headphones Jack */ 81 82 static struct snd_soc_jack loongson_asoc_hp_jack; 83 84 static struct snd_soc_jack_pin loongson_asoc_hp_jack_pins[] = { 85 { 86 .pin = "Headphone", 87 .mask = SND_JACK_HEADPHONE 88 }, 89 { 90 .pin = "Speaker", 91 .mask = SND_JACK_HEADPHONE, 92 .invert = 1 93 }, 94 }; 95 96 static struct snd_soc_jack_gpio loongson_asoc_hp_jack_gpio = { 97 .name = "Headphones detection", 98 .report = SND_JACK_HEADPHONE, 99 .debounce_time = 150, 100 }; 101 102 static int loongson_asoc_machine_init(struct snd_soc_pcm_runtime *rtd) 103 { 104 struct snd_soc_card *card = rtd->card; 105 struct loongson_card_data *ls_priv = snd_soc_card_get_drvdata(card); 106 int ret = 0; 107 108 if (!ls_priv->cfg->add_hp_jack || !ls_priv->gpiod_hp_det) 109 return 0; 110 111 ret = snd_soc_card_jack_new_pins(card, "Headphones Jack", 112 SND_JACK_HEADPHONE, 113 &loongson_asoc_hp_jack, 114 loongson_asoc_hp_jack_pins, 115 ARRAY_SIZE(loongson_asoc_hp_jack_pins)); 116 if (ret) { 117 dev_err(rtd->dev, "Headphones Jack creation failed: %d\n", ret); 118 return ret; 119 } 120 121 loongson_asoc_hp_jack_gpio.desc = ls_priv->gpiod_hp_det; 122 123 ret = snd_soc_jack_add_gpios(&loongson_asoc_hp_jack, 1, &loongson_asoc_hp_jack_gpio); 124 if (ret) 125 dev_err(rtd->dev, "Headphone GPIO not added: %d\n", ret); 126 127 return ret; 128 } 129 130 static int loongson_card_hw_params(struct snd_pcm_substream *substream, 131 struct snd_pcm_hw_params *params) 132 { 133 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 134 struct loongson_card_data *ls_card = snd_soc_card_get_drvdata(rtd->card); 135 struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0); 136 struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0); 137 int ret, mclk; 138 139 if (!ls_card->mclk_fs) 140 return 0; 141 142 mclk = ls_card->mclk_fs * params_rate(params); 143 ret = snd_soc_dai_set_sysclk(cpu_dai, 0, mclk, SND_SOC_CLOCK_OUT); 144 if (ret < 0) { 145 dev_err(codec_dai->dev, "cpu_dai clock not set\n"); 146 return ret; 147 } 148 149 ret = snd_soc_dai_set_sysclk(codec_dai, 0, mclk, SND_SOC_CLOCK_IN); 150 if (ret < 0) { 151 dev_err(codec_dai->dev, "codec_dai clock not set\n"); 152 return ret; 153 } 154 155 return snd_soc_runtime_set_dai_fmt(rtd, ls_card->cfg->fmt); 156 } 157 158 static const struct snd_soc_ops loongson_ops = { 159 .hw_params = loongson_card_hw_params, 160 }; 161 162 SND_SOC_DAILINK_DEFS(analog, 163 DAILINK_COMP_ARRAY(COMP_CPU("loongson-i2s")), 164 DAILINK_COMP_ARRAY(COMP_EMPTY()), 165 DAILINK_COMP_ARRAY(COMP_EMPTY())); 166 167 static struct snd_soc_dai_link loongson_dai_links[] = { 168 { 169 .name = "Loongson Audio Port", 170 .stream_name = "Loongson Audio", 171 .init = loongson_asoc_machine_init, 172 SND_SOC_DAILINK_REG(analog), 173 .ops = &loongson_ops, 174 }, 175 }; 176 177 static struct acpi_device *loongson_card_acpi_find_device(struct snd_soc_card *card, 178 const char *name) 179 { 180 struct fwnode_handle *fwnode = card->dev->fwnode; 181 struct fwnode_reference_args args; 182 int status; 183 184 memset(&args, 0, sizeof(args)); 185 status = acpi_node_get_property_reference(fwnode, name, 0, &args); 186 if (status || !is_acpi_device_node(args.fwnode)) { 187 dev_err(card->dev, "No matching phy in ACPI table\n"); 188 return NULL; 189 } 190 191 return to_acpi_device_node(args.fwnode); 192 } 193 194 static int loongson_card_parse_acpi(struct loongson_card_data *data) 195 { 196 struct snd_soc_card *card = &data->snd_card; 197 const char *codec_dai_name; 198 struct acpi_device *adev; 199 struct device *phy_dev; 200 int i, ret; 201 202 /* fixup platform name based on reference node */ 203 adev = loongson_card_acpi_find_device(card, "cpu"); 204 if (!adev) 205 return -ENOENT; 206 207 phy_dev = acpi_get_first_physical_node(adev); 208 if (!phy_dev) 209 return -EPROBE_DEFER; 210 211 /* fixup codec name based on reference node */ 212 adev = loongson_card_acpi_find_device(card, "codec"); 213 if (!adev) 214 return -ENOENT; 215 snprintf(codec_name, sizeof(codec_name), "i2c-%s", acpi_dev_name(adev)); 216 217 ret = device_property_read_string(card->dev, "codec-dai-name", &codec_dai_name); 218 if (ret) 219 return ret; 220 221 for (i = 0; i < card->num_links; i++) { 222 loongson_dai_links[i].platforms->name = dev_name(phy_dev); 223 loongson_dai_links[i].codecs->name = codec_name; 224 loongson_dai_links[i].codecs->dai_name = codec_dai_name; 225 } 226 227 return 0; 228 } 229 230 static int loongson_card_parse_of(struct loongson_card_data *data) 231 { 232 struct snd_soc_card *card = &data->snd_card; 233 struct device_node *cpu, *codec; 234 struct device *dev = card->dev; 235 int ret, i; 236 237 data->gpiod_hp_det = devm_gpiod_get_optional(dev, "hp-det", GPIOD_IN); 238 if (IS_ERR(data->gpiod_hp_det)) 239 return PTR_ERR(data->gpiod_hp_det); 240 241 data->gpiod_hp_ctl = devm_gpiod_get_optional(dev, "hp-ctl", GPIOD_OUT_LOW); 242 if (IS_ERR(data->gpiod_hp_ctl)) 243 return PTR_ERR(data->gpiod_hp_ctl); 244 245 data->gpiod_spkr_en = devm_gpiod_get_optional(dev, "spkr-en", GPIOD_OUT_LOW); 246 if (IS_ERR(data->gpiod_spkr_en)) 247 return PTR_ERR(data->gpiod_spkr_en); 248 249 if (data->cfg->add_dapm_routes) { 250 ret = snd_soc_of_parse_audio_routing(card, "audio-routing"); 251 if (ret) 252 return ret; 253 } 254 255 cpu = of_get_child_by_name(dev->of_node, "cpu"); 256 if (!cpu) { 257 dev_err(dev, "platform property missing or invalid\n"); 258 return -EINVAL; 259 } 260 261 codec = of_get_child_by_name(dev->of_node, "codec"); 262 if (!codec) { 263 dev_err(dev, "audio-codec property missing or invalid\n"); 264 of_node_put(cpu); 265 return -EINVAL; 266 } 267 268 for (i = 0; i < card->num_links; i++) { 269 ret = snd_soc_of_get_dlc(cpu, NULL, loongson_dai_links[i].cpus, 0); 270 if (ret < 0) { 271 dev_err(dev, "getting cpu dlc error (%d)\n", ret); 272 goto err; 273 } 274 loongson_dai_links[i].platforms->of_node = loongson_dai_links[i].cpus->of_node; 275 276 ret = snd_soc_of_get_dlc(codec, NULL, loongson_dai_links[i].codecs, 0); 277 if (ret < 0) { 278 dev_err(dev, "getting codec dlc error (%d)\n", ret); 279 goto err; 280 } 281 } 282 283 of_node_put(cpu); 284 of_node_put(codec); 285 286 return 0; 287 288 err: 289 of_node_put(cpu); 290 of_node_put(codec); 291 return ret; 292 } 293 294 static int loongson_asoc_card_probe(struct platform_device *pdev) 295 { 296 struct loongson_card_data *ls_priv; 297 struct device *dev = &pdev->dev; 298 struct snd_soc_card *card; 299 int ret; 300 301 ls_priv = devm_kzalloc(dev, sizeof(*ls_priv), GFP_KERNEL); 302 if (!ls_priv) 303 return -ENOMEM; 304 305 ls_priv->cfg = (const struct loongson_card_config *)device_get_match_data(dev); 306 if (!ls_priv->cfg) 307 return -EINVAL; 308 309 card = &ls_priv->snd_card; 310 311 card->dev = dev; 312 card->owner = THIS_MODULE; 313 card->dai_link = loongson_dai_links; 314 card->num_links = ARRAY_SIZE(loongson_dai_links); 315 316 if (ls_priv->cfg->add_dapm_widgets) { 317 card->dapm_widgets = loongson_asoc_dapm_widgets; 318 card->num_dapm_widgets = ARRAY_SIZE(loongson_asoc_dapm_widgets); 319 } 320 321 snd_soc_card_set_drvdata(card, ls_priv); 322 323 ret = device_property_read_string(dev, "model", &card->name); 324 if (ret) 325 return dev_err_probe(dev, ret, "Error parsing card name\n"); 326 327 ret = device_property_read_u32(dev, "mclk-fs", &ls_priv->mclk_fs); 328 if (ret) 329 return dev_err_probe(dev, ret, "Error parsing mclk-fs\n"); 330 331 ret = has_acpi_companion(dev) ? loongson_card_parse_acpi(ls_priv) 332 : loongson_card_parse_of(ls_priv); 333 if (ret) 334 return dev_err_probe(dev, ret, "Error parsing acpi/of properties\n"); 335 336 return devm_snd_soc_register_card(dev, card); 337 } 338 339 static const struct of_device_id loongson_asoc_dt_ids[] = { 340 /* Loongson-2K1000/Loongson-2K2000/LS7A */ 341 { 342 .compatible = "loongson,ls-audio-card", 343 .data = &ls2k1000_card_config 344 }, 345 { 346 .compatible = "loongson,ls2k0300-forever-pi-audio-card", 347 .data = &ls2k0300_forever_pi_card_config 348 }, 349 { 350 .compatible = "loongson,ls2k0300-dl2k0300b-audio-card", 351 .data = &ls2k0300_dl2k0300b_card_config 352 }, 353 { /* sentinel */ }, 354 }; 355 MODULE_DEVICE_TABLE(of, loongson_asoc_dt_ids); 356 357 static struct platform_driver loongson_audio_driver = { 358 .probe = loongson_asoc_card_probe, 359 .driver = { 360 .name = "loongson-asoc-card", 361 .pm = &snd_soc_pm_ops, 362 .of_match_table = loongson_asoc_dt_ids, 363 }, 364 }; 365 module_platform_driver(loongson_audio_driver); 366 367 MODULE_DESCRIPTION("Loongson ASoc Sound Card driver"); 368 MODULE_AUTHOR("Loongson Technology Corporation Limited"); 369 MODULE_LICENSE("GPL"); 370