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 static struct snd_soc_dai_link tegra_wm8903_dai = { 199 .name = "WM8903", 200 .stream_name = "WM8903 PCM", 201 .codec_dai_name = "wm8903-hifi", 202 .init = tegra_wm8903_init, 203 .ops = &tegra_wm8903_ops, 204 .dai_fmt = SND_SOC_DAIFMT_I2S | 205 SND_SOC_DAIFMT_NB_NF | 206 SND_SOC_DAIFMT_CBS_CFS, 207 }; 208 209 static struct snd_soc_card snd_soc_tegra_wm8903 = { 210 .name = "tegra-wm8903", 211 .owner = THIS_MODULE, 212 .dai_link = &tegra_wm8903_dai, 213 .num_links = 1, 214 .remove = tegra_wm8903_remove, 215 .controls = tegra_wm8903_controls, 216 .num_controls = ARRAY_SIZE(tegra_wm8903_controls), 217 .dapm_widgets = tegra_wm8903_dapm_widgets, 218 .num_dapm_widgets = ARRAY_SIZE(tegra_wm8903_dapm_widgets), 219 .fully_routed = true, 220 }; 221 222 static int tegra_wm8903_driver_probe(struct platform_device *pdev) 223 { 224 struct device_node *np = pdev->dev.of_node; 225 struct snd_soc_card *card = &snd_soc_tegra_wm8903; 226 struct tegra_wm8903 *machine; 227 int ret; 228 229 machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_wm8903), 230 GFP_KERNEL); 231 if (!machine) 232 return -ENOMEM; 233 234 card->dev = &pdev->dev; 235 snd_soc_card_set_drvdata(card, machine); 236 237 machine->gpio_spkr_en = of_get_named_gpio(np, "nvidia,spkr-en-gpios", 238 0); 239 if (machine->gpio_spkr_en == -EPROBE_DEFER) 240 return -EPROBE_DEFER; 241 if (gpio_is_valid(machine->gpio_spkr_en)) { 242 ret = devm_gpio_request_one(&pdev->dev, machine->gpio_spkr_en, 243 GPIOF_OUT_INIT_LOW, "spkr_en"); 244 if (ret) { 245 dev_err(card->dev, "cannot get spkr_en gpio\n"); 246 return ret; 247 } 248 } 249 250 machine->gpio_hp_mute = of_get_named_gpio(np, "nvidia,hp-mute-gpios", 251 0); 252 if (machine->gpio_hp_mute == -EPROBE_DEFER) 253 return -EPROBE_DEFER; 254 if (gpio_is_valid(machine->gpio_hp_mute)) { 255 ret = devm_gpio_request_one(&pdev->dev, machine->gpio_hp_mute, 256 GPIOF_OUT_INIT_HIGH, "hp_mute"); 257 if (ret) { 258 dev_err(card->dev, "cannot get hp_mute gpio\n"); 259 return ret; 260 } 261 } 262 263 machine->gpio_hp_det = of_get_named_gpio(np, "nvidia,hp-det-gpios", 0); 264 if (machine->gpio_hp_det == -EPROBE_DEFER) 265 return -EPROBE_DEFER; 266 267 machine->gpio_int_mic_en = of_get_named_gpio(np, 268 "nvidia,int-mic-en-gpios", 0); 269 if (machine->gpio_int_mic_en == -EPROBE_DEFER) 270 return -EPROBE_DEFER; 271 if (gpio_is_valid(machine->gpio_int_mic_en)) { 272 /* Disable int mic; enable signal is active-high */ 273 ret = devm_gpio_request_one(&pdev->dev, 274 machine->gpio_int_mic_en, 275 GPIOF_OUT_INIT_LOW, "int_mic_en"); 276 if (ret) { 277 dev_err(card->dev, "cannot get int_mic_en gpio\n"); 278 return ret; 279 } 280 } 281 282 machine->gpio_ext_mic_en = of_get_named_gpio(np, 283 "nvidia,ext-mic-en-gpios", 0); 284 if (machine->gpio_ext_mic_en == -EPROBE_DEFER) 285 return -EPROBE_DEFER; 286 if (gpio_is_valid(machine->gpio_ext_mic_en)) { 287 /* Enable ext mic; enable signal is active-low */ 288 ret = devm_gpio_request_one(&pdev->dev, 289 machine->gpio_ext_mic_en, 290 GPIOF_OUT_INIT_LOW, "ext_mic_en"); 291 if (ret) { 292 dev_err(card->dev, "cannot get ext_mic_en gpio\n"); 293 return ret; 294 } 295 } 296 297 ret = snd_soc_of_parse_card_name(card, "nvidia,model"); 298 if (ret) 299 goto err; 300 301 ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing"); 302 if (ret) 303 goto err; 304 305 tegra_wm8903_dai.codec_of_node = of_parse_phandle(np, 306 "nvidia,audio-codec", 0); 307 if (!tegra_wm8903_dai.codec_of_node) { 308 dev_err(&pdev->dev, 309 "Property 'nvidia,audio-codec' missing or invalid\n"); 310 ret = -EINVAL; 311 goto err; 312 } 313 314 tegra_wm8903_dai.cpu_of_node = of_parse_phandle(np, 315 "nvidia,i2s-controller", 0); 316 if (!tegra_wm8903_dai.cpu_of_node) { 317 dev_err(&pdev->dev, 318 "Property 'nvidia,i2s-controller' missing or invalid\n"); 319 ret = -EINVAL; 320 goto err; 321 } 322 323 tegra_wm8903_dai.platform_of_node = tegra_wm8903_dai.cpu_of_node; 324 325 ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev); 326 if (ret) 327 goto err; 328 329 ret = snd_soc_register_card(card); 330 if (ret) { 331 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", 332 ret); 333 goto err_fini_utils; 334 } 335 336 return 0; 337 338 err_fini_utils: 339 tegra_asoc_utils_fini(&machine->util_data); 340 err: 341 return ret; 342 } 343 344 static int tegra_wm8903_driver_remove(struct platform_device *pdev) 345 { 346 struct snd_soc_card *card = platform_get_drvdata(pdev); 347 struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card); 348 349 snd_soc_unregister_card(card); 350 351 tegra_asoc_utils_fini(&machine->util_data); 352 353 return 0; 354 } 355 356 static const struct of_device_id tegra_wm8903_of_match[] = { 357 { .compatible = "nvidia,tegra-audio-wm8903", }, 358 {}, 359 }; 360 361 static struct platform_driver tegra_wm8903_driver = { 362 .driver = { 363 .name = DRV_NAME, 364 .pm = &snd_soc_pm_ops, 365 .of_match_table = tegra_wm8903_of_match, 366 }, 367 .probe = tegra_wm8903_driver_probe, 368 .remove = tegra_wm8903_driver_remove, 369 }; 370 module_platform_driver(tegra_wm8903_driver); 371 372 MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>"); 373 MODULE_DESCRIPTION("Tegra+WM8903 machine ASoC driver"); 374 MODULE_LICENSE("GPL"); 375 MODULE_ALIAS("platform:" DRV_NAME); 376 MODULE_DEVICE_TABLE(of, tegra_wm8903_of_match); 377