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