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32#include <linux/module.h>
33#include <linux/moduleparam.h>
34#include <linux/kernel.h>
35#include <linux/clk.h>
36#include <linux/timer.h>
37#include <linux/interrupt.h>
38#include <linux/platform_device.h>
39#include <linux/i2c.h>
40
41#include <linux/atmel-ssc.h>
42
43#include <sound/core.h>
44#include <sound/pcm.h>
45#include <sound/pcm_params.h>
46#include <sound/soc.h>
47
48#include <asm/mach-types.h>
49#include <mach/hardware.h>
50#include <mach/gpio.h>
51
52#include "../codecs/wm8731.h"
53#include "atmel-pcm.h"
54#include "atmel_ssc_dai.h"
55
56#define MCLK_RATE 12000000
57
58
59
60
61
62
63#undef ENABLE_MIC_INPUT
64
65static struct clk *mclk;
66
67static int at91sam9g20ek_hw_params(struct snd_pcm_substream *substream,
68 struct snd_pcm_hw_params *params)
69{
70 struct snd_soc_pcm_runtime *rtd = substream->private_data;
71 struct snd_soc_dai *codec_dai = rtd->codec_dai;
72 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
73 int ret;
74
75
76 ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
77 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
78 if (ret < 0)
79 return ret;
80
81
82 ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
83 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
84 if (ret < 0)
85 return ret;
86
87 return 0;
88}
89
90static struct snd_soc_ops at91sam9g20ek_ops = {
91 .hw_params = at91sam9g20ek_hw_params,
92};
93
94static int at91sam9g20ek_set_bias_level(struct snd_soc_card *card,
95 struct snd_soc_dapm_context *dapm,
96 enum snd_soc_bias_level level)
97{
98 static int mclk_on;
99 int ret = 0;
100
101 switch (level) {
102 case SND_SOC_BIAS_ON:
103 case SND_SOC_BIAS_PREPARE:
104 if (!mclk_on)
105 ret = clk_enable(mclk);
106 if (ret == 0)
107 mclk_on = 1;
108 break;
109
110 case SND_SOC_BIAS_OFF:
111 case SND_SOC_BIAS_STANDBY:
112 if (mclk_on)
113 clk_disable(mclk);
114 mclk_on = 0;
115 break;
116 }
117
118 return ret;
119}
120
121static const struct snd_soc_dapm_widget at91sam9g20ek_dapm_widgets[] = {
122 SND_SOC_DAPM_MIC("Int Mic", NULL),
123 SND_SOC_DAPM_SPK("Ext Spk", NULL),
124};
125
126static const struct snd_soc_dapm_route intercon[] = {
127
128
129 {"Ext Spk", NULL, "LHPOUT"},
130
131
132 {"MICIN", NULL, "Mic Bias"},
133 {"Mic Bias", NULL, "Int Mic"},
134};
135
136
137
138
139static int at91sam9g20ek_wm8731_init(struct snd_soc_pcm_runtime *rtd)
140{
141 struct snd_soc_codec *codec = rtd->codec;
142 struct snd_soc_dai *codec_dai = rtd->codec_dai;
143 struct snd_soc_dapm_context *dapm = &codec->dapm;
144 int ret;
145
146 printk(KERN_DEBUG
147 "at91sam9g20ek_wm8731 "
148 ": at91sam9g20ek_wm8731_init() called\n");
149
150 ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_MCLK,
151 MCLK_RATE, SND_SOC_CLOCK_IN);
152 if (ret < 0) {
153 printk(KERN_ERR "Failed to set WM8731 SYSCLK: %d\n", ret);
154 return ret;
155 }
156
157
158 snd_soc_dapm_new_controls(dapm, at91sam9g20ek_dapm_widgets,
159 ARRAY_SIZE(at91sam9g20ek_dapm_widgets));
160
161 snd_soc_dapm_add_routes(dapm, intercon, ARRAY_SIZE(intercon));
162
163
164 snd_soc_dapm_nc_pin(dapm, "RLINEIN");
165 snd_soc_dapm_nc_pin(dapm, "LLINEIN");
166
167#ifdef ENABLE_MIC_INPUT
168 snd_soc_dapm_enable_pin(dapm, "Int Mic");
169#else
170 snd_soc_dapm_nc_pin(dapm, "Int Mic");
171#endif
172
173
174 snd_soc_dapm_enable_pin(dapm, "Ext Spk");
175
176 return 0;
177}
178
179static struct snd_soc_dai_link at91sam9g20ek_dai = {
180 .name = "WM8731",
181 .stream_name = "WM8731 PCM",
182 .cpu_dai_name = "atmel-ssc-dai.0",
183 .codec_dai_name = "wm8731-hifi",
184 .init = at91sam9g20ek_wm8731_init,
185 .platform_name = "atmel-pcm-audio",
186 .codec_name = "wm8731.0-001b",
187 .ops = &at91sam9g20ek_ops,
188};
189
190static struct snd_soc_card snd_soc_at91sam9g20ek = {
191 .name = "AT91SAMG20-EK",
192 .owner = THIS_MODULE,
193 .dai_link = &at91sam9g20ek_dai,
194 .num_links = 1,
195 .set_bias_level = at91sam9g20ek_set_bias_level,
196};
197
198static struct platform_device *at91sam9g20ek_snd_device;
199
200static int __init at91sam9g20ek_init(void)
201{
202 struct clk *pllb;
203 int ret;
204
205 if (!(machine_is_at91sam9g20ek() || machine_is_at91sam9g20ek_2mmc()))
206 return -ENODEV;
207
208 ret = atmel_ssc_set_audio(0);
209 if (ret != 0) {
210 pr_err("Failed to set SSC 0 for audio: %d\n", ret);
211 return ret;
212 }
213
214
215
216
217 mclk = clk_get(NULL, "pck0");
218 if (IS_ERR(mclk)) {
219 printk(KERN_ERR "ASoC: Failed to get MCLK\n");
220 ret = PTR_ERR(mclk);
221 goto err;
222 }
223
224 pllb = clk_get(NULL, "pllb");
225 if (IS_ERR(pllb)) {
226 printk(KERN_ERR "ASoC: Failed to get PLLB\n");
227 ret = PTR_ERR(pllb);
228 goto err_mclk;
229 }
230 ret = clk_set_parent(mclk, pllb);
231 clk_put(pllb);
232 if (ret != 0) {
233 printk(KERN_ERR "ASoC: Failed to set MCLK parent\n");
234 goto err_mclk;
235 }
236
237 clk_set_rate(mclk, MCLK_RATE);
238
239 at91sam9g20ek_snd_device = platform_device_alloc("soc-audio", -1);
240 if (!at91sam9g20ek_snd_device) {
241 printk(KERN_ERR "ASoC: Platform device allocation failed\n");
242 ret = -ENOMEM;
243 goto err_mclk;
244 }
245
246 platform_set_drvdata(at91sam9g20ek_snd_device,
247 &snd_soc_at91sam9g20ek);
248
249 ret = platform_device_add(at91sam9g20ek_snd_device);
250 if (ret) {
251 printk(KERN_ERR "ASoC: Platform device allocation failed\n");
252 goto err_device_add;
253 }
254
255 return ret;
256
257err_device_add:
258 platform_device_put(at91sam9g20ek_snd_device);
259err_mclk:
260 clk_put(mclk);
261 mclk = NULL;
262err:
263 return ret;
264}
265
266static void __exit at91sam9g20ek_exit(void)
267{
268 platform_device_unregister(at91sam9g20ek_snd_device);
269 at91sam9g20ek_snd_device = NULL;
270 clk_put(mclk);
271 mclk = NULL;
272}
273
274module_init(at91sam9g20ek_init);
275module_exit(at91sam9g20ek_exit);
276
277
278MODULE_AUTHOR("Sedji Gaouaou <sedji.gaouaou@atmel.com>");
279MODULE_DESCRIPTION("ALSA SoC AT91SAM9G20EK_WM8731");
280MODULE_LICENSE("GPL");
281
