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 = asoc_substream_to_rtd(substream); 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 int shrt = 0; 181 182 if (gpio_is_valid(machine->gpio_hp_det)) { 183 tegra_wm8903_hp_jack_gpio.gpio = machine->gpio_hp_det; 184 snd_soc_card_jack_new(rtd->card, "Headphone Jack", 185 SND_JACK_HEADPHONE, &tegra_wm8903_hp_jack, 186 tegra_wm8903_hp_jack_pins, 187 ARRAY_SIZE(tegra_wm8903_hp_jack_pins)); 188 snd_soc_jack_add_gpios(&tegra_wm8903_hp_jack, 189 1, 190 &tegra_wm8903_hp_jack_gpio); 191 } 192 193 if (of_property_read_bool(card->dev->of_node, "nvidia,headset")) 194 shrt = SND_JACK_MICROPHONE; 195 196 snd_soc_card_jack_new(rtd->card, "Mic Jack", SND_JACK_MICROPHONE, 197 &tegra_wm8903_mic_jack, 198 tegra_wm8903_mic_jack_pins, 199 ARRAY_SIZE(tegra_wm8903_mic_jack_pins)); 200 wm8903_mic_detect(component, &tegra_wm8903_mic_jack, SND_JACK_MICROPHONE, 201 shrt); 202 203 snd_soc_dapm_force_enable_pin(&card->dapm, "MICBIAS"); 204 205 return 0; 206 } 207 208 static int tegra_wm8903_remove(struct snd_soc_card *card) 209 { 210 struct snd_soc_pcm_runtime *rtd = 211 snd_soc_get_pcm_runtime(card, &card->dai_link[0]); 212 struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0); 213 struct snd_soc_component *component = codec_dai->component; 214 215 wm8903_mic_detect(component, NULL, 0, 0); 216 217 return 0; 218 } 219 220 SND_SOC_DAILINK_DEFS(hifi, 221 DAILINK_COMP_ARRAY(COMP_EMPTY()), 222 DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "wm8903-hifi")), 223 DAILINK_COMP_ARRAY(COMP_EMPTY())); 224 225 static struct snd_soc_dai_link tegra_wm8903_dai = { 226 .name = "WM8903", 227 .stream_name = "WM8903 PCM", 228 .init = tegra_wm8903_init, 229 .ops = &tegra_wm8903_ops, 230 .dai_fmt = SND_SOC_DAIFMT_I2S | 231 SND_SOC_DAIFMT_NB_NF | 232 SND_SOC_DAIFMT_CBS_CFS, 233 SND_SOC_DAILINK_REG(hifi), 234 }; 235 236 static struct snd_soc_card snd_soc_tegra_wm8903 = { 237 .name = "tegra-wm8903", 238 .owner = THIS_MODULE, 239 .dai_link = &tegra_wm8903_dai, 240 .num_links = 1, 241 .remove = tegra_wm8903_remove, 242 .controls = tegra_wm8903_controls, 243 .num_controls = ARRAY_SIZE(tegra_wm8903_controls), 244 .dapm_widgets = tegra_wm8903_dapm_widgets, 245 .num_dapm_widgets = ARRAY_SIZE(tegra_wm8903_dapm_widgets), 246 .fully_routed = true, 247 }; 248 249 static int tegra_wm8903_driver_probe(struct platform_device *pdev) 250 { 251 struct device_node *np = pdev->dev.of_node; 252 struct snd_soc_card *card = &snd_soc_tegra_wm8903; 253 struct tegra_wm8903 *machine; 254 int ret; 255 256 machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_wm8903), 257 GFP_KERNEL); 258 if (!machine) 259 return -ENOMEM; 260 261 card->dev = &pdev->dev; 262 snd_soc_card_set_drvdata(card, machine); 263 264 machine->gpio_spkr_en = of_get_named_gpio(np, "nvidia,spkr-en-gpios", 265 0); 266 if (machine->gpio_spkr_en == -EPROBE_DEFER) 267 return -EPROBE_DEFER; 268 if (gpio_is_valid(machine->gpio_spkr_en)) { 269 ret = devm_gpio_request_one(&pdev->dev, machine->gpio_spkr_en, 270 GPIOF_OUT_INIT_LOW, "spkr_en"); 271 if (ret) { 272 dev_err(card->dev, "cannot get spkr_en gpio\n"); 273 return ret; 274 } 275 } 276 277 machine->gpio_hp_mute = of_get_named_gpio(np, "nvidia,hp-mute-gpios", 278 0); 279 if (machine->gpio_hp_mute == -EPROBE_DEFER) 280 return -EPROBE_DEFER; 281 if (gpio_is_valid(machine->gpio_hp_mute)) { 282 ret = devm_gpio_request_one(&pdev->dev, machine->gpio_hp_mute, 283 GPIOF_OUT_INIT_HIGH, "hp_mute"); 284 if (ret) { 285 dev_err(card->dev, "cannot get hp_mute gpio\n"); 286 return ret; 287 } 288 } 289 290 machine->gpio_hp_det = of_get_named_gpio(np, "nvidia,hp-det-gpios", 0); 291 if (machine->gpio_hp_det == -EPROBE_DEFER) 292 return -EPROBE_DEFER; 293 294 machine->gpio_int_mic_en = of_get_named_gpio(np, 295 "nvidia,int-mic-en-gpios", 0); 296 if (machine->gpio_int_mic_en == -EPROBE_DEFER) 297 return -EPROBE_DEFER; 298 if (gpio_is_valid(machine->gpio_int_mic_en)) { 299 /* Disable int mic; enable signal is active-high */ 300 ret = devm_gpio_request_one(&pdev->dev, 301 machine->gpio_int_mic_en, 302 GPIOF_OUT_INIT_LOW, "int_mic_en"); 303 if (ret) { 304 dev_err(card->dev, "cannot get int_mic_en gpio\n"); 305 return ret; 306 } 307 } 308 309 machine->gpio_ext_mic_en = of_get_named_gpio(np, 310 "nvidia,ext-mic-en-gpios", 0); 311 if (machine->gpio_ext_mic_en == -EPROBE_DEFER) 312 return -EPROBE_DEFER; 313 if (gpio_is_valid(machine->gpio_ext_mic_en)) { 314 /* Enable ext mic; enable signal is active-low */ 315 ret = devm_gpio_request_one(&pdev->dev, 316 machine->gpio_ext_mic_en, 317 GPIOF_OUT_INIT_LOW, "ext_mic_en"); 318 if (ret) { 319 dev_err(card->dev, "cannot get ext_mic_en gpio\n"); 320 return ret; 321 } 322 } 323 324 ret = snd_soc_of_parse_card_name(card, "nvidia,model"); 325 if (ret) 326 return ret; 327 328 ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing"); 329 if (ret) 330 return ret; 331 332 tegra_wm8903_dai.codecs->of_node = of_parse_phandle(np, 333 "nvidia,audio-codec", 0); 334 if (!tegra_wm8903_dai.codecs->of_node) { 335 dev_err(&pdev->dev, 336 "Property 'nvidia,audio-codec' missing or invalid\n"); 337 return -EINVAL; 338 } 339 340 tegra_wm8903_dai.cpus->of_node = of_parse_phandle(np, 341 "nvidia,i2s-controller", 0); 342 if (!tegra_wm8903_dai.cpus->of_node) { 343 dev_err(&pdev->dev, 344 "Property 'nvidia,i2s-controller' missing or invalid\n"); 345 return -EINVAL; 346 } 347 348 tegra_wm8903_dai.platforms->of_node = tegra_wm8903_dai.cpus->of_node; 349 350 ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev); 351 if (ret) 352 return ret; 353 354 ret = devm_snd_soc_register_card(&pdev->dev, card); 355 if (ret) 356 return dev_err_probe(&pdev->dev, ret, 357 "snd_soc_register_card failed\n"); 358 359 return 0; 360 } 361 362 static const struct of_device_id tegra_wm8903_of_match[] = { 363 { .compatible = "nvidia,tegra-audio-wm8903", }, 364 {}, 365 }; 366 367 static struct platform_driver tegra_wm8903_driver = { 368 .driver = { 369 .name = DRV_NAME, 370 .pm = &snd_soc_pm_ops, 371 .of_match_table = tegra_wm8903_of_match, 372 }, 373 .probe = tegra_wm8903_driver_probe, 374 }; 375 module_platform_driver(tegra_wm8903_driver); 376 377 MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>"); 378 MODULE_DESCRIPTION("Tegra+WM8903 machine ASoC driver"); 379 MODULE_LICENSE("GPL"); 380 MODULE_ALIAS("platform:" DRV_NAME); 381 MODULE_DEVICE_TABLE(of, tegra_wm8903_of_match); 382