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Linux/sound/soc/samsung/smartq_wm8987.c

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  1 // SPDX-License-Identifier: GPL-2.0+
  2 //
  3 // Copyright 2010 Maurus Cuelenaere <mcuelenaere@gmail.com>
  4 //
  5 // Based on smdk6410_wm8987.c
  6 //     Copyright 2007 Wolfson Microelectronics PLC. - linux@wolfsonmicro.com
  7 //     Graeme Gregory - graeme.gregory@wolfsonmicro.com
  8 
  9 #include <linux/gpio/consumer.h>
 10 #include <linux/module.h>
 11 
 12 #include <sound/soc.h>
 13 #include <sound/jack.h>
 14 
 15 #include "i2s.h"
 16 #include "../codecs/wm8750.h"
 17 
 18 /*
 19  * WM8987 is register compatible with WM8750, so using that as base driver.
 20  */
 21 
 22 static struct snd_soc_card snd_soc_smartq;
 23 
 24 static int smartq_hifi_hw_params(struct snd_pcm_substream *substream,
 25         struct snd_pcm_hw_params *params)
 26 {
 27         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 28         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 29         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 30         unsigned int clk = 0;
 31         int ret;
 32 
 33         switch (params_rate(params)) {
 34         case 8000:
 35         case 16000:
 36         case 32000:
 37         case 48000:
 38         case 96000:
 39                 clk = 12288000;
 40                 break;
 41         case 11025:
 42         case 22050:
 43         case 44100:
 44         case 88200:
 45                 clk = 11289600;
 46                 break;
 47         }
 48 
 49         /* Use PCLK for I2S signal generation */
 50         ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_RCLKSRC_0,
 51                                         0, SND_SOC_CLOCK_IN);
 52         if (ret < 0)
 53                 return ret;
 54 
 55         /* Gate the RCLK output on PAD */
 56         ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_CDCLK,
 57                                         0, SND_SOC_CLOCK_IN);
 58         if (ret < 0)
 59                 return ret;
 60 
 61         /* set the codec system clock for DAC and ADC */
 62         ret = snd_soc_dai_set_sysclk(codec_dai, WM8750_SYSCLK, clk,
 63                                      SND_SOC_CLOCK_IN);
 64         if (ret < 0)
 65                 return ret;
 66 
 67         return 0;
 68 }
 69 
 70 /*
 71  * SmartQ WM8987 HiFi DAI operations.
 72  */
 73 static struct snd_soc_ops smartq_hifi_ops = {
 74         .hw_params = smartq_hifi_hw_params,
 75 };
 76 
 77 static struct snd_soc_jack smartq_jack;
 78 
 79 static struct snd_soc_jack_pin smartq_jack_pins[] = {
 80         /* Disable speaker when headphone is plugged in */
 81         {
 82                 .pin    = "Internal Speaker",
 83                 .mask   = SND_JACK_HEADPHONE,
 84         },
 85 };
 86 
 87 static struct snd_soc_jack_gpio smartq_jack_gpios[] = {
 88         {
 89                 .gpio           = -1,
 90                 .name           = "headphone detect",
 91                 .report         = SND_JACK_HEADPHONE,
 92                 .debounce_time  = 200,
 93         },
 94 };
 95 
 96 static const struct snd_kcontrol_new wm8987_smartq_controls[] = {
 97         SOC_DAPM_PIN_SWITCH("Internal Speaker"),
 98         SOC_DAPM_PIN_SWITCH("Headphone Jack"),
 99         SOC_DAPM_PIN_SWITCH("Internal Mic"),
100 };
101 
102 static int smartq_speaker_event(struct snd_soc_dapm_widget *w,
103                                 struct snd_kcontrol *k,
104                                 int event)
105 {
106         struct gpio_desc *gpio = snd_soc_card_get_drvdata(&snd_soc_smartq);
107 
108         gpiod_set_value(gpio, SND_SOC_DAPM_EVENT_OFF(event));
109 
110         return 0;
111 }
112 
113 static const struct snd_soc_dapm_widget wm8987_dapm_widgets[] = {
114         SND_SOC_DAPM_SPK("Internal Speaker", smartq_speaker_event),
115         SND_SOC_DAPM_HP("Headphone Jack", NULL),
116         SND_SOC_DAPM_MIC("Internal Mic", NULL),
117 };
118 
119 static const struct snd_soc_dapm_route audio_map[] = {
120         {"Headphone Jack", NULL, "LOUT2"},
121         {"Headphone Jack", NULL, "ROUT2"},
122 
123         {"Internal Speaker", NULL, "LOUT2"},
124         {"Internal Speaker", NULL, "ROUT2"},
125 
126         {"Mic Bias", NULL, "Internal Mic"},
127         {"LINPUT2", NULL, "Mic Bias"},
128 };
129 
130 static int smartq_wm8987_init(struct snd_soc_pcm_runtime *rtd)
131 {
132         struct snd_soc_dapm_context *dapm = &rtd->card->dapm;
133         int err = 0;
134 
135         /* set endpoints to not connected */
136         snd_soc_dapm_nc_pin(dapm, "LINPUT1");
137         snd_soc_dapm_nc_pin(dapm, "RINPUT1");
138         snd_soc_dapm_nc_pin(dapm, "OUT3");
139         snd_soc_dapm_nc_pin(dapm, "ROUT1");
140 
141         /* Headphone jack detection */
142         err = snd_soc_card_jack_new(rtd->card, "Headphone Jack",
143                                     SND_JACK_HEADPHONE, &smartq_jack,
144                                     smartq_jack_pins,
145                                     ARRAY_SIZE(smartq_jack_pins));
146         if (err)
147                 return err;
148 
149         err = snd_soc_jack_add_gpios(&smartq_jack,
150                                      ARRAY_SIZE(smartq_jack_gpios),
151                                      smartq_jack_gpios);
152 
153         return err;
154 }
155 
156 SND_SOC_DAILINK_DEFS(wm8987,
157         DAILINK_COMP_ARRAY(COMP_CPU("samsung-i2s.0")),
158         DAILINK_COMP_ARRAY(COMP_CODEC("wm8750.0-0x1a", "wm8750-hifi")),
159         DAILINK_COMP_ARRAY(COMP_PLATFORM("samsung-i2s.0")));
160 
161 static struct snd_soc_dai_link smartq_dai[] = {
162         {
163                 .name           = "wm8987",
164                 .stream_name    = "SmartQ Hi-Fi",
165                 .init           = smartq_wm8987_init,
166                 .dai_fmt        = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
167                                   SND_SOC_DAIFMT_CBS_CFS,
168                 .ops            = &smartq_hifi_ops,
169                 SND_SOC_DAILINK_REG(wm8987),
170         },
171 };
172 
173 static struct snd_soc_card snd_soc_smartq = {
174         .name = "SmartQ",
175         .owner = THIS_MODULE,
176         .dai_link = smartq_dai,
177         .num_links = ARRAY_SIZE(smartq_dai),
178 
179         .dapm_widgets = wm8987_dapm_widgets,
180         .num_dapm_widgets = ARRAY_SIZE(wm8987_dapm_widgets),
181         .dapm_routes = audio_map,
182         .num_dapm_routes = ARRAY_SIZE(audio_map),
183         .controls = wm8987_smartq_controls,
184         .num_controls = ARRAY_SIZE(wm8987_smartq_controls),
185 };
186 
187 static int smartq_probe(struct platform_device *pdev)
188 {
189         struct gpio_desc *gpio;
190         int ret;
191 
192         platform_set_drvdata(pdev, &snd_soc_smartq);
193 
194         /* Initialise GPIOs used by amplifiers */
195         gpio = devm_gpiod_get(&pdev->dev, "amplifiers shutdown",
196                               GPIOD_OUT_HIGH);
197         if (IS_ERR(gpio)) {
198                 dev_err(&pdev->dev, "Failed to register GPK12\n");
199                 ret = PTR_ERR(gpio);
200                 goto out;
201         }
202         snd_soc_card_set_drvdata(&snd_soc_smartq, gpio);
203 
204         ret = devm_snd_soc_register_card(&pdev->dev, &snd_soc_smartq);
205         if (ret)
206                 dev_err(&pdev->dev, "Failed to register card\n");
207 
208 out:
209         return ret;
210 }
211 
212 static struct platform_driver smartq_driver = {
213         .driver = {
214                 .name = "smartq-audio",
215         },
216         .probe = smartq_probe,
217 };
218 
219 module_platform_driver(smartq_driver);
220 
221 /* Module information */
222 MODULE_AUTHOR("Maurus Cuelenaere <mcuelenaere@gmail.com>");
223 MODULE_DESCRIPTION("ALSA SoC SmartQ WM8987");
224 MODULE_LICENSE("GPL");
225 

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