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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#include <linux/of.h>
41
42#include <linux/atmel-ssc.h>
43
44#include <sound/core.h>
45#include <sound/pcm.h>
46#include <sound/pcm_params.h>
47#include <sound/soc.h>
48
49#include <asm/mach-types.h>
50#include <mach/hardware.h>
51#include <mach/gpio.h>
52
53#include "../codecs/wm8731.h"
54#include "atmel-pcm.h"
55#include "atmel_ssc_dai.h"
56
57#define MCLK_RATE 12000000
58
59
60
61
62
63
64#undef ENABLE_MIC_INPUT
65
66static struct clk *mclk;
67
68static int at91sam9g20ek_hw_params(struct snd_pcm_substream *substream,
69 struct snd_pcm_hw_params *params)
70{
71 struct snd_soc_pcm_runtime *rtd = substream->private_data;
72 struct snd_soc_dai *codec_dai = rtd->codec_dai;
73 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
74 int ret;
75
76
77 ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
78 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
79 if (ret < 0)
80 return ret;
81
82
83 ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
84 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
85 if (ret < 0)
86 return ret;
87
88 return 0;
89}
90
91static struct snd_soc_ops at91sam9g20ek_ops = {
92 .hw_params = at91sam9g20ek_hw_params,
93};
94
95static int at91sam9g20ek_set_bias_level(struct snd_soc_card *card,
96 struct snd_soc_dapm_context *dapm,
97 enum snd_soc_bias_level level)
98{
99 static int mclk_on;
100 int ret = 0;
101
102 switch (level) {
103 case SND_SOC_BIAS_ON:
104 case SND_SOC_BIAS_PREPARE:
105 if (!mclk_on)
106 ret = clk_enable(mclk);
107 if (ret == 0)
108 mclk_on = 1;
109 break;
110
111 case SND_SOC_BIAS_OFF:
112 case SND_SOC_BIAS_STANDBY:
113 if (mclk_on)
114 clk_disable(mclk);
115 mclk_on = 0;
116 break;
117 }
118
119 return ret;
120}
121
122static const struct snd_soc_dapm_widget at91sam9g20ek_dapm_widgets[] = {
123 SND_SOC_DAPM_MIC("Int Mic", NULL),
124 SND_SOC_DAPM_SPK("Ext Spk", NULL),
125};
126
127static const struct snd_soc_dapm_route intercon[] = {
128
129
130 {"Ext Spk", NULL, "LHPOUT"},
131
132
133 {"MICIN", NULL, "Mic Bias"},
134 {"Mic Bias", NULL, "Int Mic"},
135};
136
137
138
139
140static int at91sam9g20ek_wm8731_init(struct snd_soc_pcm_runtime *rtd)
141{
142 struct snd_soc_codec *codec = rtd->codec;
143 struct snd_soc_dai *codec_dai = rtd->codec_dai;
144 struct snd_soc_dapm_context *dapm = &codec->dapm;
145 int ret;
146
147 printk(KERN_DEBUG
148 "at91sam9g20ek_wm8731 "
149 ": at91sam9g20ek_wm8731_init() called\n");
150
151 ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_MCLK,
152 MCLK_RATE, SND_SOC_CLOCK_IN);
153 if (ret < 0) {
154 printk(KERN_ERR "Failed to set WM8731 SYSCLK: %d\n", ret);
155 return ret;
156 }
157
158
159 snd_soc_dapm_new_controls(dapm, at91sam9g20ek_dapm_widgets,
160 ARRAY_SIZE(at91sam9g20ek_dapm_widgets));
161
162 snd_soc_dapm_add_routes(dapm, intercon, ARRAY_SIZE(intercon));
163
164
165 snd_soc_dapm_nc_pin(dapm, "RLINEIN");
166 snd_soc_dapm_nc_pin(dapm, "LLINEIN");
167
168#ifdef ENABLE_MIC_INPUT
169 snd_soc_dapm_enable_pin(dapm, "Int Mic");
170#else
171 snd_soc_dapm_nc_pin(dapm, "Int Mic");
172#endif
173
174
175 snd_soc_dapm_enable_pin(dapm, "Ext Spk");
176
177 return 0;
178}
179
180static struct snd_soc_dai_link at91sam9g20ek_dai = {
181 .name = "WM8731",
182 .stream_name = "WM8731 PCM",
183 .cpu_dai_name = "at91rm9200_ssc.0",
184 .codec_dai_name = "wm8731-hifi",
185 .init = at91sam9g20ek_wm8731_init,
186 .platform_name = "at91rm9200_ssc.0",
187 .codec_name = "wm8731.0-001b",
188 .ops = &at91sam9g20ek_ops,
189};
190
191static struct snd_soc_card snd_soc_at91sam9g20ek = {
192 .name = "AT91SAMG20-EK",
193 .owner = THIS_MODULE,
194 .dai_link = &at91sam9g20ek_dai,
195 .num_links = 1,
196 .set_bias_level = at91sam9g20ek_set_bias_level,
197};
198
199static int at91sam9g20ek_audio_probe(struct platform_device *pdev)
200{
201 struct device_node *np = pdev->dev.of_node;
202 struct device_node *codec_np, *cpu_np;
203 struct clk *pllb;
204 struct snd_soc_card *card = &snd_soc_at91sam9g20ek;
205 int ret;
206
207 if (!np) {
208 if (!(machine_is_at91sam9g20ek() ||
209 machine_is_at91sam9g20ek_2mmc()))
210 return -ENODEV;
211 }
212
213 ret = atmel_ssc_set_audio(0);
214 if (ret) {
215 dev_err(&pdev->dev, "ssc channel is not valid\n");
216 return -EINVAL;
217 }
218
219
220
221
222 mclk = clk_get(NULL, "pck0");
223 if (IS_ERR(mclk)) {
224 printk(KERN_ERR "ASoC: Failed to get MCLK\n");
225 ret = PTR_ERR(mclk);
226 goto err;
227 }
228
229 pllb = clk_get(NULL, "pllb");
230 if (IS_ERR(pllb)) {
231 printk(KERN_ERR "ASoC: Failed to get PLLB\n");
232 ret = PTR_ERR(pllb);
233 goto err_mclk;
234 }
235 ret = clk_set_parent(mclk, pllb);
236 clk_put(pllb);
237 if (ret != 0) {
238 printk(KERN_ERR "ASoC: Failed to set MCLK parent\n");
239 goto err_mclk;
240 }
241
242 clk_set_rate(mclk, MCLK_RATE);
243
244 card->dev = &pdev->dev;
245
246
247 if (np) {
248 ret = snd_soc_of_parse_card_name(card, "atmel,model");
249 if (ret)
250 goto err;
251
252 ret = snd_soc_of_parse_audio_routing(card,
253 "atmel,audio-routing");
254 if (ret)
255 goto err;
256
257
258 at91sam9g20ek_dai.codec_name = NULL;
259 codec_np = of_parse_phandle(np, "atmel,audio-codec", 0);
260 if (!codec_np) {
261 dev_err(&pdev->dev, "codec info missing\n");
262 return -EINVAL;
263 }
264 at91sam9g20ek_dai.codec_of_node = codec_np;
265
266
267 at91sam9g20ek_dai.cpu_dai_name = NULL;
268 at91sam9g20ek_dai.platform_name = NULL;
269 cpu_np = of_parse_phandle(np, "atmel,ssc-controller", 0);
270 if (!cpu_np) {
271 dev_err(&pdev->dev, "dai and pcm info missing\n");
272 return -EINVAL;
273 }
274 at91sam9g20ek_dai.cpu_of_node = cpu_np;
275 at91sam9g20ek_dai.platform_of_node = cpu_np;
276
277 of_node_put(codec_np);
278 of_node_put(cpu_np);
279 }
280
281 ret = snd_soc_register_card(card);
282 if (ret) {
283 printk(KERN_ERR "ASoC: snd_soc_register_card() failed\n");
284 }
285
286 return ret;
287
288err_mclk:
289 clk_put(mclk);
290 mclk = NULL;
291err:
292 atmel_ssc_put_audio(0);
293 return ret;
294}
295
296static int at91sam9g20ek_audio_remove(struct platform_device *pdev)
297{
298 struct snd_soc_card *card = platform_get_drvdata(pdev);
299
300 clk_disable(mclk);
301 mclk = NULL;
302 snd_soc_unregister_card(card);
303 atmel_ssc_put_audio(0);
304
305 return 0;
306}
307
308#ifdef CONFIG_OF
309static const struct of_device_id at91sam9g20ek_wm8731_dt_ids[] = {
310 { .compatible = "atmel,at91sam9g20ek-wm8731-audio", },
311 { }
312};
313MODULE_DEVICE_TABLE(of, at91sam9g20ek_wm8731_dt_ids);
314#endif
315
316static struct platform_driver at91sam9g20ek_audio_driver = {
317 .driver = {
318 .name = "at91sam9g20ek-audio",
319 .owner = THIS_MODULE,
320 .of_match_table = of_match_ptr(at91sam9g20ek_wm8731_dt_ids),
321 },
322 .probe = at91sam9g20ek_audio_probe,
323 .remove = at91sam9g20ek_audio_remove,
324};
325
326module_platform_driver(at91sam9g20ek_audio_driver);
327
328
329MODULE_AUTHOR("Sedji Gaouaou <sedji.gaouaou@atmel.com>");
330MODULE_DESCRIPTION("ALSA SoC AT91SAM9G20EK_WM8731");
331MODULE_ALIAS("platform:at91sam9g20ek-audio");
332MODULE_LICENSE("GPL");
333
