1 /*
2 * zoom2.c -- SoC audio for Zoom2
3 *
4 * Author: Misael Lopez Cruz <x0052729@ti.com>
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * version 2 as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
18 * 02110-1301 USA
19 *
20 */
21
22 #include <linux/clk.h>
23 #include <linux/platform_device.h>
24 #include <sound/core.h>
25 #include <sound/pcm.h>
26 #include <sound/soc.h>
27
28 #include <asm/mach-types.h>
29 #include <mach/hardware.h>
30 #include <mach/gpio.h>
31 #include <mach/board-zoom.h>
32 #include <plat/mcbsp.h>
33
34 /* Register descriptions for twl4030 codec part */
35 #include <linux/mfd/twl4030-audio.h>
36 #include <linux/module.h>
37
38 #include "omap-mcbsp.h"
39 #include "omap-pcm.h"
40
41 #define ZOOM2_HEADSET_MUX_GPIO (OMAP_MAX_GPIO_LINES + 15)
42
zoom2_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)43 static int zoom2_hw_params(struct snd_pcm_substream *substream,
44 struct snd_pcm_hw_params *params)
45 {
46 struct snd_soc_pcm_runtime *rtd = substream->private_data;
47 struct snd_soc_dai *codec_dai = rtd->codec_dai;
48 int ret;
49
50 /* Set the codec system clock for DAC and ADC */
51 ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
52 SND_SOC_CLOCK_IN);
53 if (ret < 0) {
54 printk(KERN_ERR "can't set codec system clock\n");
55 return ret;
56 }
57
58 return 0;
59 }
60
61 static struct snd_soc_ops zoom2_ops = {
62 .hw_params = zoom2_hw_params,
63 };
64
65 /* Zoom2 machine DAPM */
66 static const struct snd_soc_dapm_widget zoom2_twl4030_dapm_widgets[] = {
67 SND_SOC_DAPM_MIC("Ext Mic", NULL),
68 SND_SOC_DAPM_SPK("Ext Spk", NULL),
69 SND_SOC_DAPM_MIC("Headset Mic", NULL),
70 SND_SOC_DAPM_HP("Headset Stereophone", NULL),
71 SND_SOC_DAPM_LINE("Aux In", NULL),
72 };
73
74 static const struct snd_soc_dapm_route audio_map[] = {
75 /* External Mics: MAINMIC, SUBMIC with bias*/
76 {"MAINMIC", NULL, "Mic Bias 1"},
77 {"SUBMIC", NULL, "Mic Bias 2"},
78 {"Mic Bias 1", NULL, "Ext Mic"},
79 {"Mic Bias 2", NULL, "Ext Mic"},
80
81 /* External Speakers: HFL, HFR */
82 {"Ext Spk", NULL, "HFL"},
83 {"Ext Spk", NULL, "HFR"},
84
85 /* Headset Stereophone: HSOL, HSOR */
86 {"Headset Stereophone", NULL, "HSOL"},
87 {"Headset Stereophone", NULL, "HSOR"},
88
89 /* Headset Mic: HSMIC with bias */
90 {"HSMIC", NULL, "Headset Mic Bias"},
91 {"Headset Mic Bias", NULL, "Headset Mic"},
92
93 /* Aux In: AUXL, AUXR */
94 {"Aux In", NULL, "AUXL"},
95 {"Aux In", NULL, "AUXR"},
96 };
97
zoom2_twl4030_init(struct snd_soc_pcm_runtime * rtd)98 static int zoom2_twl4030_init(struct snd_soc_pcm_runtime *rtd)
99 {
100 struct snd_soc_codec *codec = rtd->codec;
101 struct snd_soc_dapm_context *dapm = &codec->dapm;
102
103 /* TWL4030 not connected pins */
104 snd_soc_dapm_nc_pin(dapm, "CARKITMIC");
105 snd_soc_dapm_nc_pin(dapm, "DIGIMIC0");
106 snd_soc_dapm_nc_pin(dapm, "DIGIMIC1");
107 snd_soc_dapm_nc_pin(dapm, "EARPIECE");
108 snd_soc_dapm_nc_pin(dapm, "PREDRIVEL");
109 snd_soc_dapm_nc_pin(dapm, "PREDRIVER");
110 snd_soc_dapm_nc_pin(dapm, "CARKITL");
111 snd_soc_dapm_nc_pin(dapm, "CARKITR");
112
113 return 0;
114 }
115
zoom2_twl4030_voice_init(struct snd_soc_pcm_runtime * rtd)116 static int zoom2_twl4030_voice_init(struct snd_soc_pcm_runtime *rtd)
117 {
118 struct snd_soc_codec *codec = rtd->codec;
119 unsigned short reg;
120
121 /* Enable voice interface */
122 reg = codec->driver->read(codec, TWL4030_REG_VOICE_IF);
123 reg |= TWL4030_VIF_DIN_EN | TWL4030_VIF_DOUT_EN | TWL4030_VIF_EN;
124 codec->driver->write(codec, TWL4030_REG_VOICE_IF, reg);
125
126 return 0;
127 }
128
129 /* Digital audio interface glue - connects codec <--> CPU */
130 static struct snd_soc_dai_link zoom2_dai[] = {
131 {
132 .name = "TWL4030 I2S",
133 .stream_name = "TWL4030 Audio",
134 .cpu_dai_name = "omap-mcbsp-dai.1",
135 .codec_dai_name = "twl4030-hifi",
136 .platform_name = "omap-pcm-audio",
137 .codec_name = "twl4030-codec",
138 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
139 SND_SOC_DAIFMT_CBM_CFM,
140 .init = zoom2_twl4030_init,
141 .ops = &zoom2_ops,
142 },
143 {
144 .name = "TWL4030 PCM",
145 .stream_name = "TWL4030 Voice",
146 .cpu_dai_name = "omap-mcbsp-dai.2",
147 .codec_dai_name = "twl4030-voice",
148 .platform_name = "omap-pcm-audio",
149 .codec_name = "twl4030-codec",
150 .dai_fmt = SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_IB_NF |
151 SND_SOC_DAIFMT_CBM_CFM,
152 .init = zoom2_twl4030_voice_init,
153 .ops = &zoom2_ops,
154 },
155 };
156
157 /* Audio machine driver */
158 static struct snd_soc_card snd_soc_zoom2 = {
159 .name = "Zoom2",
160 .owner = THIS_MODULE,
161 .dai_link = zoom2_dai,
162 .num_links = ARRAY_SIZE(zoom2_dai),
163
164 .dapm_widgets = zoom2_twl4030_dapm_widgets,
165 .num_dapm_widgets = ARRAY_SIZE(zoom2_twl4030_dapm_widgets),
166 .dapm_routes = audio_map,
167 .num_dapm_routes = ARRAY_SIZE(audio_map),
168 };
169
170 static struct platform_device *zoom2_snd_device;
171
zoom2_soc_init(void)172 static int __init zoom2_soc_init(void)
173 {
174 int ret;
175
176 if (!machine_is_omap_zoom2())
177 return -ENODEV;
178 printk(KERN_INFO "Zoom2 SoC init\n");
179
180 zoom2_snd_device = platform_device_alloc("soc-audio", -1);
181 if (!zoom2_snd_device) {
182 printk(KERN_ERR "Platform device allocation failed\n");
183 return -ENOMEM;
184 }
185
186 platform_set_drvdata(zoom2_snd_device, &snd_soc_zoom2);
187 ret = platform_device_add(zoom2_snd_device);
188 if (ret)
189 goto err1;
190
191 BUG_ON(gpio_request(ZOOM2_HEADSET_MUX_GPIO, "hs_mux") < 0);
192 gpio_direction_output(ZOOM2_HEADSET_MUX_GPIO, 0);
193
194 BUG_ON(gpio_request(ZOOM2_HEADSET_EXTMUTE_GPIO, "ext_mute") < 0);
195 gpio_direction_output(ZOOM2_HEADSET_EXTMUTE_GPIO, 0);
196
197 return 0;
198
199 err1:
200 printk(KERN_ERR "Unable to add platform device\n");
201 platform_device_put(zoom2_snd_device);
202
203 return ret;
204 }
205 module_init(zoom2_soc_init);
206
zoom2_soc_exit(void)207 static void __exit zoom2_soc_exit(void)
208 {
209 gpio_free(ZOOM2_HEADSET_MUX_GPIO);
210 gpio_free(ZOOM2_HEADSET_EXTMUTE_GPIO);
211
212 platform_device_unregister(zoom2_snd_device);
213 }
214 module_exit(zoom2_soc_exit);
215
216 MODULE_AUTHOR("Misael Lopez Cruz <x0052729@ti.com>");
217 MODULE_DESCRIPTION("ALSA SoC Zoom2");
218 MODULE_LICENSE("GPL");
219
220