1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * linux/sound/soc/pxa/z2.c
4 *
5 * SoC Audio driver for Aeronix Zipit Z2
6 *
7 * Copyright (C) 2009 Ken McGuire <kenm@desertweyr.com>
8 * Copyright (C) 2010 Marek Vasut <marek.vasut@gmail.com>
9 */
10
11 #include <linux/module.h>
12 #include <linux/moduleparam.h>
13 #include <linux/timer.h>
14 #include <linux/interrupt.h>
15 #include <linux/platform_device.h>
16 #include <linux/gpio.h>
17
18 #include <sound/core.h>
19 #include <sound/pcm.h>
20 #include <sound/soc.h>
21 #include <sound/jack.h>
22
23 #include <asm/mach-types.h>
24 #include <mach/hardware.h>
25 #include <mach/audio.h>
26 #include <mach/z2.h>
27
28 #include "../codecs/wm8750.h"
29 #include "pxa2xx-i2s.h"
30
31 static struct snd_soc_card snd_soc_z2;
32
z2_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)33 static int z2_hw_params(struct snd_pcm_substream *substream,
34 struct snd_pcm_hw_params *params)
35 {
36 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
37 struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
38 struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
39 unsigned int clk = 0;
40 int ret = 0;
41
42 switch (params_rate(params)) {
43 case 8000:
44 case 16000:
45 case 48000:
46 case 96000:
47 clk = 12288000;
48 break;
49 case 11025:
50 case 22050:
51 case 44100:
52 clk = 11289600;
53 break;
54 }
55
56 /* set the codec system clock for DAC and ADC */
57 ret = snd_soc_dai_set_sysclk(codec_dai, WM8750_SYSCLK, clk,
58 SND_SOC_CLOCK_IN);
59 if (ret < 0)
60 return ret;
61
62 /* set the I2S system clock as input (unused) */
63 ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
64 SND_SOC_CLOCK_IN);
65 if (ret < 0)
66 return ret;
67
68 return 0;
69 }
70
71 static struct snd_soc_jack hs_jack;
72
73 /* Headset jack detection DAPM pins */
74 static struct snd_soc_jack_pin hs_jack_pins[] = {
75 {
76 .pin = "Mic Jack",
77 .mask = SND_JACK_MICROPHONE,
78 },
79 {
80 .pin = "Headphone Jack",
81 .mask = SND_JACK_HEADPHONE,
82 },
83 {
84 .pin = "Ext Spk",
85 .mask = SND_JACK_HEADPHONE,
86 .invert = 1
87 },
88 };
89
90 /* Headset jack detection gpios */
91 static struct snd_soc_jack_gpio hs_jack_gpios[] = {
92 {
93 .gpio = GPIO37_ZIPITZ2_HEADSET_DETECT,
94 .name = "hsdet-gpio",
95 .report = SND_JACK_HEADSET,
96 .debounce_time = 200,
97 .invert = 1,
98 },
99 };
100
101 /* z2 machine dapm widgets */
102 static const struct snd_soc_dapm_widget wm8750_dapm_widgets[] = {
103 SND_SOC_DAPM_HP("Headphone Jack", NULL),
104 SND_SOC_DAPM_MIC("Mic Jack", NULL),
105 SND_SOC_DAPM_SPK("Ext Spk", NULL),
106
107 /* headset is a mic and mono headphone */
108 SND_SOC_DAPM_HP("Headset Jack", NULL),
109 };
110
111 /* Z2 machine audio_map */
112 static const struct snd_soc_dapm_route z2_audio_map[] = {
113
114 /* headphone connected to LOUT1, ROUT1 */
115 {"Headphone Jack", NULL, "LOUT1"},
116 {"Headphone Jack", NULL, "ROUT1"},
117
118 /* ext speaker connected to LOUT2, ROUT2 */
119 {"Ext Spk", NULL, "ROUT2"},
120 {"Ext Spk", NULL, "LOUT2"},
121
122 /* mic is connected to R input 2 - with bias */
123 {"RINPUT2", NULL, "Mic Bias"},
124 {"Mic Bias", NULL, "Mic Jack"},
125 };
126
127 /*
128 * Logic for a wm8750 as connected on a Z2 Device
129 */
z2_wm8750_init(struct snd_soc_pcm_runtime * rtd)130 static int z2_wm8750_init(struct snd_soc_pcm_runtime *rtd)
131 {
132 int ret;
133
134 /* Jack detection API stuff */
135 ret = snd_soc_card_jack_new(rtd->card, "Headset Jack", SND_JACK_HEADSET,
136 &hs_jack, hs_jack_pins,
137 ARRAY_SIZE(hs_jack_pins));
138 if (ret)
139 goto err;
140
141 ret = snd_soc_jack_add_gpios(&hs_jack, ARRAY_SIZE(hs_jack_gpios),
142 hs_jack_gpios);
143 if (ret)
144 goto err;
145
146 return 0;
147
148 err:
149 return ret;
150 }
151
152 static const struct snd_soc_ops z2_ops = {
153 .hw_params = z2_hw_params,
154 };
155
156 /* z2 digital audio interface glue - connects codec <--> CPU */
157 SND_SOC_DAILINK_DEFS(wm8750,
158 DAILINK_COMP_ARRAY(COMP_CPU("pxa2xx-i2s")),
159 DAILINK_COMP_ARRAY(COMP_CODEC("wm8750.0-001b", "wm8750-hifi")),
160 DAILINK_COMP_ARRAY(COMP_PLATFORM("pxa-pcm-audio")));
161
162 static struct snd_soc_dai_link z2_dai = {
163 .name = "wm8750",
164 .stream_name = "WM8750",
165 .init = z2_wm8750_init,
166 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
167 SND_SOC_DAIFMT_CBS_CFS,
168 .ops = &z2_ops,
169 SND_SOC_DAILINK_REG(wm8750),
170 };
171
172 /* z2 audio machine driver */
173 static struct snd_soc_card snd_soc_z2 = {
174 .name = "Z2",
175 .owner = THIS_MODULE,
176 .dai_link = &z2_dai,
177 .num_links = 1,
178
179 .dapm_widgets = wm8750_dapm_widgets,
180 .num_dapm_widgets = ARRAY_SIZE(wm8750_dapm_widgets),
181 .dapm_routes = z2_audio_map,
182 .num_dapm_routes = ARRAY_SIZE(z2_audio_map),
183 .fully_routed = true,
184 };
185
186 static struct platform_device *z2_snd_device;
187
z2_init(void)188 static int __init z2_init(void)
189 {
190 int ret;
191
192 if (!machine_is_zipit2())
193 return -ENODEV;
194
195 z2_snd_device = platform_device_alloc("soc-audio", -1);
196 if (!z2_snd_device)
197 return -ENOMEM;
198
199 platform_set_drvdata(z2_snd_device, &snd_soc_z2);
200 ret = platform_device_add(z2_snd_device);
201
202 if (ret)
203 platform_device_put(z2_snd_device);
204
205 return ret;
206 }
207
z2_exit(void)208 static void __exit z2_exit(void)
209 {
210 platform_device_unregister(z2_snd_device);
211 }
212
213 module_init(z2_init);
214 module_exit(z2_exit);
215
216 MODULE_AUTHOR("Ken McGuire <kenm@desertweyr.com>, "
217 "Marek Vasut <marek.vasut@gmail.com>");
218 MODULE_DESCRIPTION("ALSA SoC ZipitZ2");
219 MODULE_LICENSE("GPL");
220