1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * tegra_wm8903.c - Tegra machine ASoC driver for boards using WM8903 codec. 4 * 5 * Author: Stephen Warren <swarren@nvidia.com> 6 * Copyright (C) 2010-2012 - NVIDIA, Inc. 7 * 8 * Based on code copyright/by: 9 * 10 * (c) 2009, 2010 Nvidia Graphics Pvt. Ltd. 11 * 12 * Copyright 2007 Wolfson Microelectronics PLC. 13 * Author: Graeme Gregory 14 * graeme.gregory@wolfsonmicro.com or linux@wolfsonmicro.com 15 */ 16 17 #include <linux/module.h> 18 #include <linux/platform_device.h> 19 #include <linux/slab.h> 20 #include <linux/gpio.h> 21 #include <linux/of_gpio.h> 22 23 #include <sound/core.h> 24 #include <sound/jack.h> 25 #include <sound/pcm.h> 26 #include <sound/pcm_params.h> 27 #include <sound/soc.h> 28 29 #include "../codecs/wm8903.h" 30 31 #include "tegra_asoc_utils.h" 32 33 #define DRV_NAME "tegra-snd-wm8903" 34 35 struct tegra_wm8903 { 36 int gpio_spkr_en; 37 int gpio_hp_det; 38 int gpio_hp_mute; 39 int gpio_int_mic_en; 40 int gpio_ext_mic_en; 41 struct tegra_asoc_utils_data util_data; 42 }; 43 44 static int tegra_wm8903_hw_params(struct snd_pcm_substream *substream, 45 struct snd_pcm_hw_params *params) 46 { 47 struct snd_soc_pcm_runtime *rtd = substream->private_data; 48 struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0); 49 struct snd_soc_card *card = rtd->card; 50 struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card); 51 int srate, mclk; 52 int err; 53 54 srate = params_rate(params); 55 switch (srate) { 56 case 64000: 57 case 88200: 58 case 96000: 59 mclk = 128 * srate; 60 break; 61 default: 62 mclk = 256 * srate; 63 break; 64 } 65 /* FIXME: Codec only requires >= 3MHz if OSR==0 */ 66 while (mclk < 6000000) 67 mclk *= 2; 68 69 err = tegra_asoc_utils_set_rate(&machine->util_data, srate, mclk); 70 if (err < 0) { 71 dev_err(card->dev, "Can't configure clocks\n"); 72 return err; 73 } 74 75 err = snd_soc_dai_set_sysclk(codec_dai, 0, mclk, 76 SND_SOC_CLOCK_IN); 77 if (err < 0) { 78 dev_err(card->dev, "codec_dai clock not set\n"); 79 return err; 80 } 81 82 return 0; 83 } 84 85 static const struct snd_soc_ops tegra_wm8903_ops = { 86 .hw_params = tegra_wm8903_hw_params, 87 }; 88 89 static struct snd_soc_jack tegra_wm8903_hp_jack; 90 91 static struct snd_soc_jack_pin tegra_wm8903_hp_jack_pins[] = { 92 { 93 .pin = "Headphone Jack", 94 .mask = SND_JACK_HEADPHONE, 95 }, 96 }; 97 98 static struct snd_soc_jack_gpio tegra_wm8903_hp_jack_gpio = { 99 .name = "headphone detect", 100 .report = SND_JACK_HEADPHONE, 101 .debounce_time = 150, 102 .invert = 1, 103 }; 104 105 static struct snd_soc_jack tegra_wm8903_mic_jack; 106 107 static struct snd_soc_jack_pin tegra_wm8903_mic_jack_pins[] = { 108 { 109 .pin = "Mic Jack", 110 .mask = SND_JACK_MICROPHONE, 111 }, 112 }; 113 114 static int tegra_wm8903_event_int_spk(struct snd_soc_dapm_widget *w, 115 struct snd_kcontrol *k, int event) 116 { 117 struct snd_soc_dapm_context *dapm = w->dapm; 118 struct snd_soc_card *card = dapm->card; 119 struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card); 120 121 if (!gpio_is_valid(machine->gpio_spkr_en)) 122 return 0; 123 124 gpio_set_value_cansleep(machine->gpio_spkr_en, 125 SND_SOC_DAPM_EVENT_ON(event)); 126 127 return 0; 128 } 129 130 static int tegra_wm8903_event_hp(struct snd_soc_dapm_widget *w, 131 struct snd_kcontrol *k, int event) 132 { 133 struct snd_soc_dapm_context *dapm = w->dapm; 134 struct snd_soc_card *card = dapm->card; 135 struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card); 136 137 if (!gpio_is_valid(machine->gpio_hp_mute)) 138 return 0; 139 140 gpio_set_value_cansleep(machine->gpio_hp_mute, 141 !SND_SOC_DAPM_EVENT_ON(event)); 142 143 return 0; 144 } 145 146 static int tegra_wm8903_event_int_mic(struct snd_soc_dapm_widget *w, 147 struct snd_kcontrol *k, int event) 148 { 149 struct snd_soc_dapm_context *dapm = w->dapm; 150 struct snd_soc_card *card = dapm->card; 151 struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card); 152 153 if (!gpio_is_valid(machine->gpio_int_mic_en)) 154 return 0; 155 156 gpio_set_value_cansleep(machine->gpio_int_mic_en, 157 SND_SOC_DAPM_EVENT_ON(event)); 158 159 return 0; 160 } 161 162 static const struct snd_soc_dapm_widget tegra_wm8903_dapm_widgets[] = { 163 SND_SOC_DAPM_SPK("Int Spk", tegra_wm8903_event_int_spk), 164 SND_SOC_DAPM_HP("Headphone Jack", tegra_wm8903_event_hp), 165 SND_SOC_DAPM_MIC("Mic Jack", NULL), 166 SND_SOC_DAPM_MIC("Int Mic", tegra_wm8903_event_int_mic), 167 }; 168 169 static const struct snd_kcontrol_new tegra_wm8903_controls[] = { 170 SOC_DAPM_PIN_SWITCH("Int Spk"), 171 SOC_DAPM_PIN_SWITCH("Int Mic"), 172 }; 173 174 static int tegra_wm8903_init(struct snd_soc_pcm_runtime *rtd) 175 { 176 struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0); 177 struct snd_soc_component *component = codec_dai->component; 178 struct snd_soc_card *card = rtd->card; 179 struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card); 180 181 if (gpio_is_valid(machine->gpio_hp_det)) { 182 tegra_wm8903_hp_jack_gpio.gpio = machine->gpio_hp_det; 183 snd_soc_card_jack_new(rtd->card, "Headphone Jack", 184 SND_JACK_HEADPHONE, &tegra_wm8903_hp_jack, 185 tegra_wm8903_hp_jack_pins, 186 ARRAY_SIZE(tegra_wm8903_hp_jack_pins)); 187 snd_soc_jack_add_gpios(&tegra_wm8903_hp_jack, 188 1, 189 &tegra_wm8903_hp_jack_gpio); 190 } 191 192 snd_soc_card_jack_new(rtd->card, "Mic Jack", SND_JACK_MICROPHONE, 193 &tegra_wm8903_mic_jack, 194 tegra_wm8903_mic_jack_pins, 195 ARRAY_SIZE(tegra_wm8903_mic_jack_pins)); 196 wm8903_mic_detect(component, &tegra_wm8903_mic_jack, SND_JACK_MICROPHONE, 197 0); 198 199 snd_soc_dapm_force_enable_pin(&card->dapm, "MICBIAS"); 200 201 return 0; 202 } 203 204 static int tegra_wm8903_remove(struct snd_soc_card *card) 205 { 206 struct snd_soc_pcm_runtime *rtd = 207 snd_soc_get_pcm_runtime(card, &card->dai_link[0]); 208 struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0); 209 struct snd_soc_component *component = codec_dai->component; 210 211 wm8903_mic_detect(component, NULL, 0, 0); 212 213 return 0; 214 } 215 216 SND_SOC_DAILINK_DEFS(hifi, 217 DAILINK_COMP_ARRAY(COMP_EMPTY()), 218 DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "wm8903-hifi")), 219 DAILINK_COMP_ARRAY(COMP_EMPTY())); 220 221 static struct snd_soc_dai_link tegra_wm8903_dai = { 222 .name = "WM8903", 223 .stream_name = "WM8903 PCM", 224 .init = tegra_wm8903_init, 225 .ops = &tegra_wm8903_ops, 226 .dai_fmt = SND_SOC_DAIFMT_I2S | 227 SND_SOC_DAIFMT_NB_NF | 228 SND_SOC_DAIFMT_CBS_CFS, 229 SND_SOC_DAILINK_REG(hifi), 230 }; 231 232 static struct snd_soc_card snd_soc_tegra_wm8903 = { 233 .name = "tegra-wm8903", 234 .owner = THIS_MODULE, 235 .dai_link = &tegra_wm8903_dai, 236 .num_links = 1, 237 .remove = tegra_wm8903_remove, 238 .controls = tegra_wm8903_controls, 239 .num_controls = ARRAY_SIZE(tegra_wm8903_controls), 240 .dapm_widgets = tegra_wm8903_dapm_widgets, 241 .num_dapm_widgets = ARRAY_SIZE(tegra_wm8903_dapm_widgets), 242 .fully_routed = true, 243 }; 244 245 static int tegra_wm8903_driver_probe(struct platform_device *pdev) 246 { 247 struct device_node *np = pdev->dev.of_node; 248 struct snd_soc_card *card = &snd_soc_tegra_wm8903; 249 struct tegra_wm8903 *machine; 250 int ret; 251 252 machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_wm8903), 253 GFP_KERNEL); 254 if (!machine) 255 return -ENOMEM; 256 257 card->dev = &pdev->dev; 258 snd_soc_card_set_drvdata(card, machine); 259 260 machine->gpio_spkr_en = of_get_named_gpio(np, "nvidia,spkr-en-gpios", 261 0); 262 if (machine->gpio_spkr_en == -EPROBE_DEFER) 263 return -EPROBE_DEFER; 264 if (gpio_is_valid(machine->gpio_spkr_en)) { 265 ret = devm_gpio_request_one(&pdev->dev, machine->gpio_spkr_en, 266 GPIOF_OUT_INIT_LOW, "spkr_en"); 267 if (ret) { 268 dev_err(card->dev, "cannot get spkr_en gpio\n"); 269 return ret; 270 } 271 } 272 273 machine->gpio_hp_mute = of_get_named_gpio(np, "nvidia,hp-mute-gpios", 274 0); 275 if (machine->gpio_hp_mute == -EPROBE_DEFER) 276 return -EPROBE_DEFER; 277 if (gpio_is_valid(machine->gpio_hp_mute)) { 278 ret = devm_gpio_request_one(&pdev->dev, machine->gpio_hp_mute, 279 GPIOF_OUT_INIT_HIGH, "hp_mute"); 280 if (ret) { 281 dev_err(card->dev, "cannot get hp_mute gpio\n"); 282 return ret; 283 } 284 } 285 286 machine->gpio_hp_det = of_get_named_gpio(np, "nvidia,hp-det-gpios", 0); 287 if (machine->gpio_hp_det == -EPROBE_DEFER) 288 return -EPROBE_DEFER; 289 290 machine->gpio_int_mic_en = of_get_named_gpio(np, 291 "nvidia,int-mic-en-gpios", 0); 292 if (machine->gpio_int_mic_en == -EPROBE_DEFER) 293 return -EPROBE_DEFER; 294 if (gpio_is_valid(machine->gpio_int_mic_en)) { 295 /* Disable int mic; enable signal is active-high */ 296 ret = devm_gpio_request_one(&pdev->dev, 297 machine->gpio_int_mic_en, 298 GPIOF_OUT_INIT_LOW, "int_mic_en"); 299 if (ret) { 300 dev_err(card->dev, "cannot get int_mic_en gpio\n"); 301 return ret; 302 } 303 } 304 305 machine->gpio_ext_mic_en = of_get_named_gpio(np, 306 "nvidia,ext-mic-en-gpios", 0); 307 if (machine->gpio_ext_mic_en == -EPROBE_DEFER) 308 return -EPROBE_DEFER; 309 if (gpio_is_valid(machine->gpio_ext_mic_en)) { 310 /* Enable ext mic; enable signal is active-low */ 311 ret = devm_gpio_request_one(&pdev->dev, 312 machine->gpio_ext_mic_en, 313 GPIOF_OUT_INIT_LOW, "ext_mic_en"); 314 if (ret) { 315 dev_err(card->dev, "cannot get ext_mic_en gpio\n"); 316 return ret; 317 } 318 } 319 320 ret = snd_soc_of_parse_card_name(card, "nvidia,model"); 321 if (ret) 322 goto err; 323 324 ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing"); 325 if (ret) 326 goto err; 327 328 tegra_wm8903_dai.codecs->of_node = of_parse_phandle(np, 329 "nvidia,audio-codec", 0); 330 if (!tegra_wm8903_dai.codecs->of_node) { 331 dev_err(&pdev->dev, 332 "Property 'nvidia,audio-codec' missing or invalid\n"); 333 ret = -EINVAL; 334 goto err; 335 } 336 337 tegra_wm8903_dai.cpus->of_node = of_parse_phandle(np, 338 "nvidia,i2s-controller", 0); 339 if (!tegra_wm8903_dai.cpus->of_node) { 340 dev_err(&pdev->dev, 341 "Property 'nvidia,i2s-controller' missing or invalid\n"); 342 ret = -EINVAL; 343 goto err; 344 } 345 346 tegra_wm8903_dai.platforms->of_node = tegra_wm8903_dai.cpus->of_node; 347 348 ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev); 349 if (ret) 350 goto err; 351 352 ret = snd_soc_register_card(card); 353 if (ret) { 354 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", 355 ret); 356 goto err_fini_utils; 357 } 358 359 return 0; 360 361 err_fini_utils: 362 tegra_asoc_utils_fini(&machine->util_data); 363 err: 364 return ret; 365 } 366 367 static int tegra_wm8903_driver_remove(struct platform_device *pdev) 368 { 369 struct snd_soc_card *card = platform_get_drvdata(pdev); 370 struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card); 371 372 snd_soc_unregister_card(card); 373 374 tegra_asoc_utils_fini(&machine->util_data); 375 376 return 0; 377 } 378 379 static const struct of_device_id tegra_wm8903_of_match[] = { 380 { .compatible = "nvidia,tegra-audio-wm8903", }, 381 {}, 382 }; 383 384 static struct platform_driver tegra_wm8903_driver = { 385 .driver = { 386 .name = DRV_NAME, 387 .pm = &snd_soc_pm_ops, 388 .of_match_table = tegra_wm8903_of_match, 389 }, 390 .probe = tegra_wm8903_driver_probe, 391 .remove = tegra_wm8903_driver_remove, 392 }; 393 module_platform_driver(tegra_wm8903_driver); 394 395 MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>"); 396 MODULE_DESCRIPTION("Tegra+WM8903 machine ASoC driver"); 397 MODULE_LICENSE("GPL"); 398 MODULE_ALIAS("platform:" DRV_NAME); 399 MODULE_DEVICE_TABLE(of, tegra_wm8903_of_match); 400