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Linux/sound/soc/pxa/z2.c

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  1 /*
  2  * linux/sound/soc/pxa/z2.c
  3  *
  4  * SoC Audio driver for Aeronix Zipit Z2
  5  *
  6  * Copyright (C) 2009 Ken McGuire <kenm@desertweyr.com>
  7  * Copyright (C) 2010 Marek Vasut <marek.vasut@gmail.com>
  8  *
  9  * This program is free software; you can redistribute it and/or modify
 10  * it under the terms of the GNU General Public License version 2 as
 11  * published by the Free Software Foundation.
 12  */
 13 
 14 #include <linux/module.h>
 15 #include <linux/moduleparam.h>
 16 #include <linux/timer.h>
 17 #include <linux/interrupt.h>
 18 #include <linux/platform_device.h>
 19 #include <linux/gpio.h>
 20 
 21 #include <sound/core.h>
 22 #include <sound/pcm.h>
 23 #include <sound/soc.h>
 24 #include <sound/jack.h>
 25 
 26 #include <asm/mach-types.h>
 27 #include <mach/hardware.h>
 28 #include <mach/audio.h>
 29 #include <mach/z2.h>
 30 
 31 #include "../codecs/wm8750.h"
 32 #include "pxa2xx-i2s.h"
 33 
 34 static struct snd_soc_card snd_soc_z2;
 35 
 36 static int z2_hw_params(struct snd_pcm_substream *substream,
 37         struct snd_pcm_hw_params *params)
 38 {
 39         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 40         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 41         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 42         unsigned int clk = 0;
 43         int ret = 0;
 44 
 45         switch (params_rate(params)) {
 46         case 8000:
 47         case 16000:
 48         case 48000:
 49         case 96000:
 50                 clk = 12288000;
 51                 break;
 52         case 11025:
 53         case 22050:
 54         case 44100:
 55                 clk = 11289600;
 56                 break;
 57         }
 58 
 59         /* set the codec system clock for DAC and ADC */
 60         ret = snd_soc_dai_set_sysclk(codec_dai, WM8750_SYSCLK, clk,
 61                 SND_SOC_CLOCK_IN);
 62         if (ret < 0)
 63                 return ret;
 64 
 65         /* set the I2S system clock as input (unused) */
 66         ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
 67                 SND_SOC_CLOCK_IN);
 68         if (ret < 0)
 69                 return ret;
 70 
 71         return 0;
 72 }
 73 
 74 static struct snd_soc_jack hs_jack;
 75 
 76 /* Headset jack detection DAPM pins */
 77 static struct snd_soc_jack_pin hs_jack_pins[] = {
 78         {
 79                 .pin    = "Mic Jack",
 80                 .mask   = SND_JACK_MICROPHONE,
 81         },
 82         {
 83                 .pin    = "Headphone Jack",
 84                 .mask   = SND_JACK_HEADPHONE,
 85         },
 86         {
 87                 .pin    = "Ext Spk",
 88                 .mask   = SND_JACK_HEADPHONE,
 89                 .invert = 1
 90         },
 91 };
 92 
 93 /* Headset jack detection gpios */
 94 static struct snd_soc_jack_gpio hs_jack_gpios[] = {
 95         {
 96                 .gpio           = GPIO37_ZIPITZ2_HEADSET_DETECT,
 97                 .name           = "hsdet-gpio",
 98                 .report         = SND_JACK_HEADSET,
 99                 .debounce_time  = 200,
100                 .invert         = 1,
101         },
102 };
103 
104 /* z2 machine dapm widgets */
105 static const struct snd_soc_dapm_widget wm8750_dapm_widgets[] = {
106         SND_SOC_DAPM_HP("Headphone Jack", NULL),
107         SND_SOC_DAPM_MIC("Mic Jack", NULL),
108         SND_SOC_DAPM_SPK("Ext Spk", NULL),
109 
110         /* headset is a mic and mono headphone */
111         SND_SOC_DAPM_HP("Headset Jack", NULL),
112 };
113 
114 /* Z2 machine audio_map */
115 static const struct snd_soc_dapm_route z2_audio_map[] = {
116 
117         /* headphone connected to LOUT1, ROUT1 */
118         {"Headphone Jack", NULL, "LOUT1"},
119         {"Headphone Jack", NULL, "ROUT1"},
120 
121         /* ext speaker connected to LOUT2, ROUT2  */
122         {"Ext Spk", NULL, "ROUT2"},
123         {"Ext Spk", NULL, "LOUT2"},
124 
125         /* mic is connected to R input 2 - with bias */
126         {"RINPUT2", NULL, "Mic Bias"},
127         {"Mic Bias", NULL, "Mic Jack"},
128 };
129 
130 /*
131  * Logic for a wm8750 as connected on a Z2 Device
132  */
133 static int z2_wm8750_init(struct snd_soc_pcm_runtime *rtd)
134 {
135         int ret;
136 
137         /* Jack detection API stuff */
138         ret = snd_soc_card_jack_new(rtd->card, "Headset Jack", SND_JACK_HEADSET,
139                                     &hs_jack, hs_jack_pins,
140                                     ARRAY_SIZE(hs_jack_pins));
141         if (ret)
142                 goto err;
143 
144         ret = snd_soc_jack_add_gpios(&hs_jack, ARRAY_SIZE(hs_jack_gpios),
145                                 hs_jack_gpios);
146         if (ret)
147                 goto err;
148 
149         return 0;
150 
151 err:
152         return ret;
153 }
154 
155 static const struct snd_soc_ops z2_ops = {
156         .hw_params = z2_hw_params,
157 };
158 
159 /* z2 digital audio interface glue - connects codec <--> CPU */
160 static struct snd_soc_dai_link z2_dai = {
161         .name           = "wm8750",
162         .stream_name    = "WM8750",
163         .cpu_dai_name   = "pxa2xx-i2s",
164         .codec_dai_name = "wm8750-hifi",
165         .platform_name = "pxa-pcm-audio",
166         .codec_name     = "wm8750.0-001b",
167         .init           = z2_wm8750_init,
168         .dai_fmt        = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
169                           SND_SOC_DAIFMT_CBS_CFS,
170         .ops            = &z2_ops,
171 };
172 
173 /* z2 audio machine driver */
174 static struct snd_soc_card snd_soc_z2 = {
175         .name           = "Z2",
176         .owner          = THIS_MODULE,
177         .dai_link       = &z2_dai,
178         .num_links      = 1,
179 
180         .dapm_widgets = wm8750_dapm_widgets,
181         .num_dapm_widgets = ARRAY_SIZE(wm8750_dapm_widgets),
182         .dapm_routes = z2_audio_map,
183         .num_dapm_routes = ARRAY_SIZE(z2_audio_map),
184         .fully_routed = true,
185 };
186 
187 static struct platform_device *z2_snd_device;
188 
189 static int __init z2_init(void)
190 {
191         int ret;
192 
193         if (!machine_is_zipit2())
194                 return -ENODEV;
195 
196         z2_snd_device = platform_device_alloc("soc-audio", -1);
197         if (!z2_snd_device)
198                 return -ENOMEM;
199 
200         platform_set_drvdata(z2_snd_device, &snd_soc_z2);
201         ret = platform_device_add(z2_snd_device);
202 
203         if (ret)
204                 platform_device_put(z2_snd_device);
205 
206         return ret;
207 }
208 
209 static void __exit z2_exit(void)
210 {
211         platform_device_unregister(z2_snd_device);
212 }
213 
214 module_init(z2_init);
215 module_exit(z2_exit);
216 
217 MODULE_AUTHOR("Ken McGuire <kenm@desertweyr.com>, "
218                 "Marek Vasut <marek.vasut@gmail.com>");
219 MODULE_DESCRIPTION("ALSA SoC ZipitZ2");
220 MODULE_LICENSE("GPL");
221 

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