1 /* 2 * tegra_wm8903.c - Tegra machine ASoC driver for boards using WM8903 codec. 3 * 4 * Author: Stephen Warren <swarren@nvidia.com> 5 * Copyright (C) 2010-2012 - NVIDIA, Inc. 6 * 7 * Based on code copyright/by: 8 * 9 * (c) 2009, 2010 Nvidia Graphics Pvt. Ltd. 10 * 11 * Copyright 2007 Wolfson Microelectronics PLC. 12 * Author: Graeme Gregory 13 * graeme.gregory@wolfsonmicro.com or linux@wolfsonmicro.com 14 * 15 * This program is free software; you can redistribute it and/or 16 * modify it under the terms of the GNU General Public License 17 * version 2 as published by the Free Software Foundation. 18 * 19 * This program is distributed in the hope that it will be useful, but 20 * WITHOUT ANY WARRANTY; without even the implied warranty of 21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 22 * General Public License for more details. 23 * 24 * You should have received a copy of the GNU General Public License 25 * along with this program; if not, write to the Free Software 26 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 27 * 02110-1301 USA 28 * 29 */ 30 31 #include <linux/module.h> 32 #include <linux/platform_device.h> 33 #include <linux/slab.h> 34 #include <linux/gpio.h> 35 #include <linux/of_gpio.h> 36 37 #include <sound/core.h> 38 #include <sound/jack.h> 39 #include <sound/pcm.h> 40 #include <sound/pcm_params.h> 41 #include <sound/soc.h> 42 43 #include "../codecs/wm8903.h" 44 45 #include "tegra_asoc_utils.h" 46 47 #define DRV_NAME "tegra-snd-wm8903" 48 49 struct tegra_wm8903 { 50 int gpio_spkr_en; 51 int gpio_hp_det; 52 int gpio_hp_mute; 53 int gpio_int_mic_en; 54 int gpio_ext_mic_en; 55 struct tegra_asoc_utils_data util_data; 56 }; 57 58 static int tegra_wm8903_hw_params(struct snd_pcm_substream *substream, 59 struct snd_pcm_hw_params *params) 60 { 61 struct snd_soc_pcm_runtime *rtd = substream->private_data; 62 struct snd_soc_dai *codec_dai = rtd->codec_dai; 63 struct snd_soc_codec *codec = codec_dai->codec; 64 struct snd_soc_card *card = codec->card; 65 struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card); 66 int srate, mclk; 67 int err; 68 69 srate = params_rate(params); 70 switch (srate) { 71 case 64000: 72 case 88200: 73 case 96000: 74 mclk = 128 * srate; 75 break; 76 default: 77 mclk = 256 * srate; 78 break; 79 } 80 /* FIXME: Codec only requires >= 3MHz if OSR==0 */ 81 while (mclk < 6000000) 82 mclk *= 2; 83 84 err = tegra_asoc_utils_set_rate(&machine->util_data, srate, mclk); 85 if (err < 0) { 86 dev_err(card->dev, "Can't configure clocks\n"); 87 return err; 88 } 89 90 err = snd_soc_dai_set_sysclk(codec_dai, 0, mclk, 91 SND_SOC_CLOCK_IN); 92 if (err < 0) { 93 dev_err(card->dev, "codec_dai clock not set\n"); 94 return err; 95 } 96 97 return 0; 98 } 99 100 static struct snd_soc_ops tegra_wm8903_ops = { 101 .hw_params = tegra_wm8903_hw_params, 102 }; 103 104 static struct snd_soc_jack tegra_wm8903_hp_jack; 105 106 static struct snd_soc_jack_pin tegra_wm8903_hp_jack_pins[] = { 107 { 108 .pin = "Headphone Jack", 109 .mask = SND_JACK_HEADPHONE, 110 }, 111 }; 112 113 static struct snd_soc_jack_gpio tegra_wm8903_hp_jack_gpio = { 114 .name = "headphone detect", 115 .report = SND_JACK_HEADPHONE, 116 .debounce_time = 150, 117 .invert = 1, 118 }; 119 120 static struct snd_soc_jack tegra_wm8903_mic_jack; 121 122 static struct snd_soc_jack_pin tegra_wm8903_mic_jack_pins[] = { 123 { 124 .pin = "Mic Jack", 125 .mask = SND_JACK_MICROPHONE, 126 }, 127 }; 128 129 static int tegra_wm8903_event_int_spk(struct snd_soc_dapm_widget *w, 130 struct snd_kcontrol *k, int event) 131 { 132 struct snd_soc_dapm_context *dapm = w->dapm; 133 struct snd_soc_card *card = dapm->card; 134 struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card); 135 136 if (!gpio_is_valid(machine->gpio_spkr_en)) 137 return 0; 138 139 gpio_set_value_cansleep(machine->gpio_spkr_en, 140 SND_SOC_DAPM_EVENT_ON(event)); 141 142 return 0; 143 } 144 145 static int tegra_wm8903_event_hp(struct snd_soc_dapm_widget *w, 146 struct snd_kcontrol *k, int event) 147 { 148 struct snd_soc_dapm_context *dapm = w->dapm; 149 struct snd_soc_card *card = dapm->card; 150 struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card); 151 152 if (!gpio_is_valid(machine->gpio_hp_mute)) 153 return 0; 154 155 gpio_set_value_cansleep(machine->gpio_hp_mute, 156 !SND_SOC_DAPM_EVENT_ON(event)); 157 158 return 0; 159 } 160 161 static const struct snd_soc_dapm_widget tegra_wm8903_dapm_widgets[] = { 162 SND_SOC_DAPM_SPK("Int Spk", tegra_wm8903_event_int_spk), 163 SND_SOC_DAPM_HP("Headphone Jack", tegra_wm8903_event_hp), 164 SND_SOC_DAPM_MIC("Mic Jack", NULL), 165 }; 166 167 static const struct snd_kcontrol_new tegra_wm8903_controls[] = { 168 SOC_DAPM_PIN_SWITCH("Int Spk"), 169 }; 170 171 static int tegra_wm8903_init(struct snd_soc_pcm_runtime *rtd) 172 { 173 struct snd_soc_dai *codec_dai = rtd->codec_dai; 174 struct snd_soc_codec *codec = codec_dai->codec; 175 struct snd_soc_dapm_context *dapm = &codec->dapm; 176 struct snd_soc_card *card = codec->card; 177 struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card); 178 179 if (gpio_is_valid(machine->gpio_hp_det)) { 180 tegra_wm8903_hp_jack_gpio.gpio = machine->gpio_hp_det; 181 snd_soc_jack_new(codec, "Headphone Jack", SND_JACK_HEADPHONE, 182 &tegra_wm8903_hp_jack); 183 snd_soc_jack_add_pins(&tegra_wm8903_hp_jack, 184 ARRAY_SIZE(tegra_wm8903_hp_jack_pins), 185 tegra_wm8903_hp_jack_pins); 186 snd_soc_jack_add_gpios(&tegra_wm8903_hp_jack, 187 1, 188 &tegra_wm8903_hp_jack_gpio); 189 } 190 191 snd_soc_jack_new(codec, "Mic Jack", SND_JACK_MICROPHONE, 192 &tegra_wm8903_mic_jack); 193 snd_soc_jack_add_pins(&tegra_wm8903_mic_jack, 194 ARRAY_SIZE(tegra_wm8903_mic_jack_pins), 195 tegra_wm8903_mic_jack_pins); 196 wm8903_mic_detect(codec, &tegra_wm8903_mic_jack, SND_JACK_MICROPHONE, 197 0); 198 199 snd_soc_dapm_force_enable_pin(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 = &(card->rtd[0]); 207 struct snd_soc_dai *codec_dai = rtd->codec_dai; 208 struct snd_soc_codec *codec = codec_dai->codec; 209 210 wm8903_mic_detect(codec, NULL, 0, 0); 211 212 return 0; 213 } 214 215 static struct snd_soc_dai_link tegra_wm8903_dai = { 216 .name = "WM8903", 217 .stream_name = "WM8903 PCM", 218 .codec_dai_name = "wm8903-hifi", 219 .init = tegra_wm8903_init, 220 .ops = &tegra_wm8903_ops, 221 .dai_fmt = SND_SOC_DAIFMT_I2S | 222 SND_SOC_DAIFMT_NB_NF | 223 SND_SOC_DAIFMT_CBS_CFS, 224 }; 225 226 static struct snd_soc_card snd_soc_tegra_wm8903 = { 227 .name = "tegra-wm8903", 228 .owner = THIS_MODULE, 229 .dai_link = &tegra_wm8903_dai, 230 .num_links = 1, 231 232 .remove = tegra_wm8903_remove, 233 234 .controls = tegra_wm8903_controls, 235 .num_controls = ARRAY_SIZE(tegra_wm8903_controls), 236 .dapm_widgets = tegra_wm8903_dapm_widgets, 237 .num_dapm_widgets = ARRAY_SIZE(tegra_wm8903_dapm_widgets), 238 .fully_routed = true, 239 }; 240 241 static int tegra_wm8903_driver_probe(struct platform_device *pdev) 242 { 243 struct device_node *np = pdev->dev.of_node; 244 struct snd_soc_card *card = &snd_soc_tegra_wm8903; 245 struct tegra_wm8903 *machine; 246 int ret; 247 248 machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_wm8903), 249 GFP_KERNEL); 250 if (!machine) { 251 dev_err(&pdev->dev, "Can't allocate tegra_wm8903 struct\n"); 252 return -ENOMEM; 253 } 254 255 card->dev = &pdev->dev; 256 platform_set_drvdata(pdev, card); 257 snd_soc_card_set_drvdata(card, machine); 258 259 machine->gpio_spkr_en = of_get_named_gpio(np, "nvidia,spkr-en-gpios", 260 0); 261 if (machine->gpio_spkr_en == -EPROBE_DEFER) 262 return -EPROBE_DEFER; 263 if (gpio_is_valid(machine->gpio_spkr_en)) { 264 ret = devm_gpio_request_one(&pdev->dev, machine->gpio_spkr_en, 265 GPIOF_OUT_INIT_LOW, "spkr_en"); 266 if (ret) { 267 dev_err(card->dev, "cannot get spkr_en gpio\n"); 268 return ret; 269 } 270 } 271 272 machine->gpio_hp_mute = of_get_named_gpio(np, "nvidia,hp-mute-gpios", 273 0); 274 if (machine->gpio_hp_mute == -EPROBE_DEFER) 275 return -EPROBE_DEFER; 276 if (gpio_is_valid(machine->gpio_hp_mute)) { 277 ret = devm_gpio_request_one(&pdev->dev, machine->gpio_hp_mute, 278 GPIOF_OUT_INIT_HIGH, "hp_mute"); 279 if (ret) { 280 dev_err(card->dev, "cannot get hp_mute gpio\n"); 281 return ret; 282 } 283 } 284 285 machine->gpio_hp_det = of_get_named_gpio(np, "nvidia,hp-det-gpios", 0); 286 if (machine->gpio_hp_det == -EPROBE_DEFER) 287 return -EPROBE_DEFER; 288 289 machine->gpio_int_mic_en = of_get_named_gpio(np, 290 "nvidia,int-mic-en-gpios", 0); 291 if (machine->gpio_int_mic_en == -EPROBE_DEFER) 292 return -EPROBE_DEFER; 293 if (gpio_is_valid(machine->gpio_int_mic_en)) { 294 /* Disable int mic; enable signal is active-high */ 295 ret = devm_gpio_request_one(&pdev->dev, 296 machine->gpio_int_mic_en, 297 GPIOF_OUT_INIT_LOW, "int_mic_en"); 298 if (ret) { 299 dev_err(card->dev, "cannot get int_mic_en gpio\n"); 300 return ret; 301 } 302 } 303 304 machine->gpio_ext_mic_en = of_get_named_gpio(np, 305 "nvidia,ext-mic-en-gpios", 0); 306 if (machine->gpio_ext_mic_en == -EPROBE_DEFER) 307 return -EPROBE_DEFER; 308 if (gpio_is_valid(machine->gpio_ext_mic_en)) { 309 /* Enable ext mic; enable signal is active-low */ 310 ret = devm_gpio_request_one(&pdev->dev, 311 machine->gpio_ext_mic_en, 312 GPIOF_OUT_INIT_LOW, "ext_mic_en"); 313 if (ret) { 314 dev_err(card->dev, "cannot get ext_mic_en gpio\n"); 315 return ret; 316 } 317 } 318 319 ret = snd_soc_of_parse_card_name(card, "nvidia,model"); 320 if (ret) 321 goto err; 322 323 ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing"); 324 if (ret) 325 goto err; 326 327 tegra_wm8903_dai.codec_of_node = of_parse_phandle(np, 328 "nvidia,audio-codec", 0); 329 if (!tegra_wm8903_dai.codec_of_node) { 330 dev_err(&pdev->dev, 331 "Property 'nvidia,audio-codec' missing or invalid\n"); 332 ret = -EINVAL; 333 goto err; 334 } 335 336 tegra_wm8903_dai.cpu_of_node = of_parse_phandle(np, 337 "nvidia,i2s-controller", 0); 338 if (!tegra_wm8903_dai.cpu_of_node) { 339 dev_err(&pdev->dev, 340 "Property 'nvidia,i2s-controller' missing or invalid\n"); 341 ret = -EINVAL; 342 goto err; 343 } 344 345 tegra_wm8903_dai.platform_of_node = tegra_wm8903_dai.cpu_of_node; 346 347 ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev); 348 if (ret) 349 goto err; 350 351 ret = snd_soc_register_card(card); 352 if (ret) { 353 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", 354 ret); 355 goto err_fini_utils; 356 } 357 358 return 0; 359 360 err_fini_utils: 361 tegra_asoc_utils_fini(&machine->util_data); 362 err: 363 return ret; 364 } 365 366 static int tegra_wm8903_driver_remove(struct platform_device *pdev) 367 { 368 struct snd_soc_card *card = platform_get_drvdata(pdev); 369 struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card); 370 371 snd_soc_jack_free_gpios(&tegra_wm8903_hp_jack, 1, 372 &tegra_wm8903_hp_jack_gpio); 373 374 snd_soc_unregister_card(card); 375 376 tegra_asoc_utils_fini(&machine->util_data); 377 378 return 0; 379 } 380 381 static const struct of_device_id tegra_wm8903_of_match[] = { 382 { .compatible = "nvidia,tegra-audio-wm8903", }, 383 {}, 384 }; 385 386 static struct platform_driver tegra_wm8903_driver = { 387 .driver = { 388 .name = DRV_NAME, 389 .owner = THIS_MODULE, 390 .pm = &snd_soc_pm_ops, 391 .of_match_table = tegra_wm8903_of_match, 392 }, 393 .probe = tegra_wm8903_driver_probe, 394 .remove = tegra_wm8903_driver_remove, 395 }; 396 module_platform_driver(tegra_wm8903_driver); 397 398 MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>"); 399 MODULE_DESCRIPTION("Tegra+WM8903 machine ASoC driver"); 400 MODULE_LICENSE("GPL"); 401 MODULE_ALIAS("platform:" DRV_NAME); 402 MODULE_DEVICE_TABLE(of, tegra_wm8903_of_match); 403