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
z2_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)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 */
z2_wm8750_init(struct snd_soc_pcm_runtime * rtd)133 static int z2_wm8750_init(struct snd_soc_pcm_runtime *rtd)
134 {
135 struct snd_soc_codec *codec = rtd->codec;
136 struct snd_soc_dapm_context *dapm = &codec->dapm;
137 int ret;
138
139 /* NC codec pins */
140 snd_soc_dapm_disable_pin(dapm, "LINPUT3");
141 snd_soc_dapm_disable_pin(dapm, "RINPUT3");
142 snd_soc_dapm_disable_pin(dapm, "OUT3");
143 snd_soc_dapm_disable_pin(dapm, "MONO1");
144
145 /* Jack detection API stuff */
146 ret = snd_soc_jack_new(codec, "Headset Jack", SND_JACK_HEADSET,
147 &hs_jack);
148 if (ret)
149 goto err;
150
151 ret = snd_soc_jack_add_pins(&hs_jack, ARRAY_SIZE(hs_jack_pins),
152 hs_jack_pins);
153 if (ret)
154 goto err;
155
156 ret = snd_soc_jack_add_gpios(&hs_jack, ARRAY_SIZE(hs_jack_gpios),
157 hs_jack_gpios);
158 if (ret)
159 goto err;
160
161 return 0;
162
163 err:
164 return ret;
165 }
166
167 static struct snd_soc_ops z2_ops = {
168 .hw_params = z2_hw_params,
169 };
170
171 /* z2 digital audio interface glue - connects codec <--> CPU */
172 static struct snd_soc_dai_link z2_dai = {
173 .name = "wm8750",
174 .stream_name = "WM8750",
175 .cpu_dai_name = "pxa2xx-i2s",
176 .codec_dai_name = "wm8750-hifi",
177 .platform_name = "pxa-pcm-audio",
178 .codec_name = "wm8750.0-001b",
179 .init = z2_wm8750_init,
180 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
181 SND_SOC_DAIFMT_CBS_CFS,
182 .ops = &z2_ops,
183 };
184
185 /* z2 audio machine driver */
186 static struct snd_soc_card snd_soc_z2 = {
187 .name = "Z2",
188 .owner = THIS_MODULE,
189 .dai_link = &z2_dai,
190 .num_links = 1,
191
192 .dapm_widgets = wm8750_dapm_widgets,
193 .num_dapm_widgets = ARRAY_SIZE(wm8750_dapm_widgets),
194 .dapm_routes = z2_audio_map,
195 .num_dapm_routes = ARRAY_SIZE(z2_audio_map),
196 };
197
198 static struct platform_device *z2_snd_device;
199
z2_init(void)200 static int __init z2_init(void)
201 {
202 int ret;
203
204 if (!machine_is_zipit2())
205 return -ENODEV;
206
207 z2_snd_device = platform_device_alloc("soc-audio", -1);
208 if (!z2_snd_device)
209 return -ENOMEM;
210
211 platform_set_drvdata(z2_snd_device, &snd_soc_z2);
212 ret = platform_device_add(z2_snd_device);
213
214 if (ret)
215 platform_device_put(z2_snd_device);
216
217 return ret;
218 }
219
z2_exit(void)220 static void __exit z2_exit(void)
221 {
222 platform_device_unregister(z2_snd_device);
223 }
224
225 module_init(z2_init);
226 module_exit(z2_exit);
227
228 MODULE_AUTHOR("Ken McGuire <kenm@desertweyr.com>, "
229 "Marek Vasut <marek.vasut@gmail.com>");
230 MODULE_DESCRIPTION("ALSA SoC ZipitZ2");
231 MODULE_LICENSE("GPL");
232