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 = rtd->codec_dai; 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 const struct snd_soc_dapm_widget tegra_wm8903_dapm_widgets[] = { 147 SND_SOC_DAPM_SPK("Int Spk", tegra_wm8903_event_int_spk), 148 SND_SOC_DAPM_HP("Headphone Jack", tegra_wm8903_event_hp), 149 SND_SOC_DAPM_MIC("Mic Jack", NULL), 150 }; 151 152 static const struct snd_kcontrol_new tegra_wm8903_controls[] = { 153 SOC_DAPM_PIN_SWITCH("Int Spk"), 154 }; 155 156 static int tegra_wm8903_init(struct snd_soc_pcm_runtime *rtd) 157 { 158 struct snd_soc_dai *codec_dai = rtd->codec_dai; 159 struct snd_soc_component *component = codec_dai->component; 160 struct snd_soc_card *card = rtd->card; 161 struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card); 162 163 if (gpio_is_valid(machine->gpio_hp_det)) { 164 tegra_wm8903_hp_jack_gpio.gpio = machine->gpio_hp_det; 165 snd_soc_card_jack_new(rtd->card, "Headphone Jack", 166 SND_JACK_HEADPHONE, &tegra_wm8903_hp_jack, 167 tegra_wm8903_hp_jack_pins, 168 ARRAY_SIZE(tegra_wm8903_hp_jack_pins)); 169 snd_soc_jack_add_gpios(&tegra_wm8903_hp_jack, 170 1, 171 &tegra_wm8903_hp_jack_gpio); 172 } 173 174 snd_soc_card_jack_new(rtd->card, "Mic Jack", SND_JACK_MICROPHONE, 175 &tegra_wm8903_mic_jack, 176 tegra_wm8903_mic_jack_pins, 177 ARRAY_SIZE(tegra_wm8903_mic_jack_pins)); 178 wm8903_mic_detect(component, &tegra_wm8903_mic_jack, SND_JACK_MICROPHONE, 179 0); 180 181 snd_soc_dapm_force_enable_pin(&card->dapm, "MICBIAS"); 182 183 return 0; 184 } 185 186 static int tegra_wm8903_remove(struct snd_soc_card *card) 187 { 188 struct snd_soc_pcm_runtime *rtd = 189 snd_soc_get_pcm_runtime(card, card->dai_link[0].name); 190 struct snd_soc_dai *codec_dai = rtd->codec_dai; 191 struct snd_soc_component *component = codec_dai->component; 192 193 wm8903_mic_detect(component, NULL, 0, 0); 194 195 return 0; 196 } 197 198 SND_SOC_DAILINK_DEFS(hifi, 199 DAILINK_COMP_ARRAY(COMP_EMPTY()), 200 DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "wm8903-hifi")), 201 DAILINK_COMP_ARRAY(COMP_EMPTY())); 202 203 static struct snd_soc_dai_link tegra_wm8903_dai = { 204 .name = "WM8903", 205 .stream_name = "WM8903 PCM", 206 .init = tegra_wm8903_init, 207 .ops = &tegra_wm8903_ops, 208 .dai_fmt = SND_SOC_DAIFMT_I2S | 209 SND_SOC_DAIFMT_NB_NF | 210 SND_SOC_DAIFMT_CBS_CFS, 211 SND_SOC_DAILINK_REG(hifi), 212 }; 213 214 static struct snd_soc_card snd_soc_tegra_wm8903 = { 215 .name = "tegra-wm8903", 216 .owner = THIS_MODULE, 217 .dai_link = &tegra_wm8903_dai, 218 .num_links = 1, 219 .remove = tegra_wm8903_remove, 220 .controls = tegra_wm8903_controls, 221 .num_controls = ARRAY_SIZE(tegra_wm8903_controls), 222 .dapm_widgets = tegra_wm8903_dapm_widgets, 223 .num_dapm_widgets = ARRAY_SIZE(tegra_wm8903_dapm_widgets), 224 .fully_routed = true, 225 }; 226 227 static int tegra_wm8903_driver_probe(struct platform_device *pdev) 228 { 229 struct device_node *np = pdev->dev.of_node; 230 struct snd_soc_card *card = &snd_soc_tegra_wm8903; 231 struct tegra_wm8903 *machine; 232 int ret; 233 234 machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_wm8903), 235 GFP_KERNEL); 236 if (!machine) 237 return -ENOMEM; 238 239 card->dev = &pdev->dev; 240 snd_soc_card_set_drvdata(card, machine); 241 242 machine->gpio_spkr_en = of_get_named_gpio(np, "nvidia,spkr-en-gpios", 243 0); 244 if (machine->gpio_spkr_en == -EPROBE_DEFER) 245 return -EPROBE_DEFER; 246 if (gpio_is_valid(machine->gpio_spkr_en)) { 247 ret = devm_gpio_request_one(&pdev->dev, machine->gpio_spkr_en, 248 GPIOF_OUT_INIT_LOW, "spkr_en"); 249 if (ret) { 250 dev_err(card->dev, "cannot get spkr_en gpio\n"); 251 return ret; 252 } 253 } 254 255 machine->gpio_hp_mute = of_get_named_gpio(np, "nvidia,hp-mute-gpios", 256 0); 257 if (machine->gpio_hp_mute == -EPROBE_DEFER) 258 return -EPROBE_DEFER; 259 if (gpio_is_valid(machine->gpio_hp_mute)) { 260 ret = devm_gpio_request_one(&pdev->dev, machine->gpio_hp_mute, 261 GPIOF_OUT_INIT_HIGH, "hp_mute"); 262 if (ret) { 263 dev_err(card->dev, "cannot get hp_mute gpio\n"); 264 return ret; 265 } 266 } 267 268 machine->gpio_hp_det = of_get_named_gpio(np, "nvidia,hp-det-gpios", 0); 269 if (machine->gpio_hp_det == -EPROBE_DEFER) 270 return -EPROBE_DEFER; 271 272 machine->gpio_int_mic_en = of_get_named_gpio(np, 273 "nvidia,int-mic-en-gpios", 0); 274 if (machine->gpio_int_mic_en == -EPROBE_DEFER) 275 return -EPROBE_DEFER; 276 if (gpio_is_valid(machine->gpio_int_mic_en)) { 277 /* Disable int mic; enable signal is active-high */ 278 ret = devm_gpio_request_one(&pdev->dev, 279 machine->gpio_int_mic_en, 280 GPIOF_OUT_INIT_LOW, "int_mic_en"); 281 if (ret) { 282 dev_err(card->dev, "cannot get int_mic_en gpio\n"); 283 return ret; 284 } 285 } 286 287 machine->gpio_ext_mic_en = of_get_named_gpio(np, 288 "nvidia,ext-mic-en-gpios", 0); 289 if (machine->gpio_ext_mic_en == -EPROBE_DEFER) 290 return -EPROBE_DEFER; 291 if (gpio_is_valid(machine->gpio_ext_mic_en)) { 292 /* Enable ext mic; enable signal is active-low */ 293 ret = devm_gpio_request_one(&pdev->dev, 294 machine->gpio_ext_mic_en, 295 GPIOF_OUT_INIT_LOW, "ext_mic_en"); 296 if (ret) { 297 dev_err(card->dev, "cannot get ext_mic_en gpio\n"); 298 return ret; 299 } 300 } 301 302 ret = snd_soc_of_parse_card_name(card, "nvidia,model"); 303 if (ret) 304 goto err; 305 306 ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing"); 307 if (ret) 308 goto err; 309 310 tegra_wm8903_dai.codecs->of_node = of_parse_phandle(np, 311 "nvidia,audio-codec", 0); 312 if (!tegra_wm8903_dai.codecs->of_node) { 313 dev_err(&pdev->dev, 314 "Property 'nvidia,audio-codec' missing or invalid\n"); 315 ret = -EINVAL; 316 goto err; 317 } 318 319 tegra_wm8903_dai.cpus->of_node = of_parse_phandle(np, 320 "nvidia,i2s-controller", 0); 321 if (!tegra_wm8903_dai.cpus->of_node) { 322 dev_err(&pdev->dev, 323 "Property 'nvidia,i2s-controller' missing or invalid\n"); 324 ret = -EINVAL; 325 goto err; 326 } 327 328 tegra_wm8903_dai.platforms->of_node = tegra_wm8903_dai.cpus->of_node; 329 330 ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev); 331 if (ret) 332 goto err; 333 334 ret = snd_soc_register_card(card); 335 if (ret) { 336 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", 337 ret); 338 goto err_fini_utils; 339 } 340 341 return 0; 342 343 err_fini_utils: 344 tegra_asoc_utils_fini(&machine->util_data); 345 err: 346 return ret; 347 } 348 349 static int tegra_wm8903_driver_remove(struct platform_device *pdev) 350 { 351 struct snd_soc_card *card = platform_get_drvdata(pdev); 352 struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card); 353 354 snd_soc_unregister_card(card); 355 356 tegra_asoc_utils_fini(&machine->util_data); 357 358 return 0; 359 } 360 361 static const struct of_device_id tegra_wm8903_of_match[] = { 362 { .compatible = "nvidia,tegra-audio-wm8903", }, 363 {}, 364 }; 365 366 static struct platform_driver tegra_wm8903_driver = { 367 .driver = { 368 .name = DRV_NAME, 369 .pm = &snd_soc_pm_ops, 370 .of_match_table = tegra_wm8903_of_match, 371 }, 372 .probe = tegra_wm8903_driver_probe, 373 .remove = tegra_wm8903_driver_remove, 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