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12#include <linux/init.h>
13#include <linux/module.h>
14#include <linux/slab.h>
15#include <linux/device.h>
16#include <linux/delay.h>
17#include <linux/mutex.h>
18#include <linux/suspend.h>
19#include <sound/core.h>
20#include <sound/pcm.h>
21#include <sound/initval.h>
22#include <sound/soc.h>
23#include <linux/clk.h>
24
25#include <mach/mfp.h>
26
27#include "nuc900-audio.h"
28
29static DEFINE_MUTEX(ac97_mutex);
30struct nuc900_audio *nuc900_ac97_data;
31EXPORT_SYMBOL_GPL(nuc900_ac97_data);
32
33static int nuc900_checkready(void)
34{
35 struct nuc900_audio *nuc900_audio = nuc900_ac97_data;
36
37 if (!(AUDIO_READ(nuc900_audio->mmio + ACTL_ACIS0) & CODEC_READY))
38 return -EPERM;
39
40 return 0;
41}
42
43
44static unsigned short nuc900_ac97_read(struct snd_ac97 *ac97,
45 unsigned short reg)
46{
47 struct nuc900_audio *nuc900_audio = nuc900_ac97_data;
48 unsigned long timeout = 0x10000, val;
49
50 mutex_lock(&ac97_mutex);
51
52 val = nuc900_checkready();
53 if (val) {
54 dev_err(nuc900_audio->dev, "AC97 codec is not ready\n");
55 goto out;
56 }
57
58
59 AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACOS1, R_WB | reg);
60
61
62 val = AUDIO_READ(nuc900_audio->mmio + ACTL_ACOS0);
63 val |= (VALID_FRAME | SLOT1_VALID);
64 AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACOS0, val);
65
66 udelay(100);
67
68
69 while (!(AUDIO_READ(nuc900_audio->mmio + ACTL_ACCON) & AC_R_FINISH)
70 && timeout--)
71 mdelay(1);
72
73 if (!timeout) {
74 dev_err(nuc900_audio->dev, "AC97 read register time out !\n");
75 val = -EPERM;
76 goto out;
77 }
78
79 val = AUDIO_READ(nuc900_audio->mmio + ACTL_ACOS0) ;
80 val &= ~SLOT1_VALID;
81 AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACOS0, val);
82
83 if (AUDIO_READ(nuc900_audio->mmio + ACTL_ACIS1) >> 2 != reg) {
84 dev_err(nuc900_audio->dev,
85 "R_INDEX of REG_ACTL_ACIS1 not match!\n");
86 }
87
88 udelay(100);
89 val = (AUDIO_READ(nuc900_audio->mmio + ACTL_ACIS2) & 0xFFFF);
90
91out:
92 mutex_unlock(&ac97_mutex);
93 return val;
94}
95
96
97static void nuc900_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
98 unsigned short val)
99{
100 struct nuc900_audio *nuc900_audio = nuc900_ac97_data;
101 unsigned long tmp, timeout = 0x10000;
102
103 mutex_lock(&ac97_mutex);
104
105 tmp = nuc900_checkready();
106 if (tmp)
107 dev_err(nuc900_audio->dev, "AC97 codec is not ready\n");
108
109
110 AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACOS1, reg);
111
112
113 AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACOS2, val);
114
115
116 tmp = AUDIO_READ(nuc900_audio->mmio + ACTL_ACOS0);
117 tmp |= SLOT1_VALID | SLOT2_VALID | VALID_FRAME;
118 AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACOS0, tmp);
119
120 udelay(100);
121
122
123 while ((AUDIO_READ(nuc900_audio->mmio + ACTL_ACCON) & AC_W_FINISH)
124 && timeout--)
125 mdelay(1);
126
127 if (!timeout)
128 dev_err(nuc900_audio->dev, "AC97 write register time out !\n");
129
130 tmp = AUDIO_READ(nuc900_audio->mmio + ACTL_ACOS0);
131 tmp &= ~(SLOT1_VALID | SLOT2_VALID);
132 AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACOS0, tmp);
133
134 mutex_unlock(&ac97_mutex);
135
136}
137
138static void nuc900_ac97_warm_reset(struct snd_ac97 *ac97)
139{
140 struct nuc900_audio *nuc900_audio = nuc900_ac97_data;
141 unsigned long val;
142
143 mutex_lock(&ac97_mutex);
144
145
146 val = AUDIO_READ(nuc900_audio->mmio + ACTL_ACCON);
147 val |= AC_W_RES;
148 AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACCON, val);
149
150 udelay(100);
151
152 val = nuc900_checkready();
153 if (val)
154 dev_err(nuc900_audio->dev, "AC97 codec is not ready\n");
155
156 mutex_unlock(&ac97_mutex);
157}
158
159static void nuc900_ac97_cold_reset(struct snd_ac97 *ac97)
160{
161 struct nuc900_audio *nuc900_audio = nuc900_ac97_data;
162 unsigned long val;
163
164 mutex_lock(&ac97_mutex);
165
166
167 val = AUDIO_READ(nuc900_audio->mmio + ACTL_RESET);
168 val |= ACTL_RESET_BIT;
169 AUDIO_WRITE(nuc900_audio->mmio + ACTL_RESET, val);
170
171 val = AUDIO_READ(nuc900_audio->mmio + ACTL_RESET);
172 val &= (~ACTL_RESET_BIT);
173 AUDIO_WRITE(nuc900_audio->mmio + ACTL_RESET, val);
174
175
176
177 val = AUDIO_READ(nuc900_audio->mmio + ACTL_RESET);
178 val |= AC_RESET;
179 AUDIO_WRITE(nuc900_audio->mmio + ACTL_RESET, val);
180
181 val = AUDIO_READ(nuc900_audio->mmio + ACTL_RESET);
182 val &= ~AC_RESET;
183 AUDIO_WRITE(nuc900_audio->mmio + ACTL_RESET, val);
184
185
186 val = AUDIO_READ(nuc900_audio->mmio + ACTL_ACCON);
187 val |= AC_C_RES;
188 AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACCON, val);
189
190 val = AUDIO_READ(nuc900_audio->mmio + ACTL_ACCON);
191 val &= (~AC_C_RES);
192 AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACCON, val);
193
194 udelay(100);
195
196 mutex_unlock(&ac97_mutex);
197
198}
199
200
201static struct snd_ac97_bus_ops nuc900_ac97_ops = {
202 .read = nuc900_ac97_read,
203 .write = nuc900_ac97_write,
204 .reset = nuc900_ac97_cold_reset,
205 .warm_reset = nuc900_ac97_warm_reset,
206};
207
208static int nuc900_ac97_trigger(struct snd_pcm_substream *substream,
209 int cmd, struct snd_soc_dai *dai)
210{
211 struct nuc900_audio *nuc900_audio = nuc900_ac97_data;
212 int ret;
213 unsigned long val, tmp;
214
215 ret = 0;
216
217 switch (cmd) {
218 case SNDRV_PCM_TRIGGER_START:
219 case SNDRV_PCM_TRIGGER_RESUME:
220 val = AUDIO_READ(nuc900_audio->mmio + ACTL_RESET);
221 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
222 tmp = AUDIO_READ(nuc900_audio->mmio + ACTL_ACOS0);
223 tmp |= (SLOT3_VALID | SLOT4_VALID | VALID_FRAME);
224 AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACOS0, tmp);
225
226 tmp = AUDIO_READ(nuc900_audio->mmio + ACTL_PSR);
227 tmp |= (P_DMA_END_IRQ | P_DMA_MIDDLE_IRQ);
228 AUDIO_WRITE(nuc900_audio->mmio + ACTL_PSR, tmp);
229 val |= AC_PLAY;
230 } else {
231 tmp = AUDIO_READ(nuc900_audio->mmio + ACTL_RSR);
232 tmp |= (R_DMA_END_IRQ | R_DMA_MIDDLE_IRQ);
233
234 AUDIO_WRITE(nuc900_audio->mmio + ACTL_RSR, tmp);
235 val |= AC_RECORD;
236 }
237
238 AUDIO_WRITE(nuc900_audio->mmio + ACTL_RESET, val);
239
240 break;
241 case SNDRV_PCM_TRIGGER_STOP:
242 case SNDRV_PCM_TRIGGER_SUSPEND:
243 val = AUDIO_READ(nuc900_audio->mmio + ACTL_RESET);
244 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
245 tmp = AUDIO_READ(nuc900_audio->mmio + ACTL_ACOS0);
246 tmp &= ~(SLOT3_VALID | SLOT4_VALID);
247 AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACOS0, tmp);
248
249 AUDIO_WRITE(nuc900_audio->mmio + ACTL_PSR, RESET_PRSR);
250 val &= ~AC_PLAY;
251 } else {
252 AUDIO_WRITE(nuc900_audio->mmio + ACTL_RSR, RESET_PRSR);
253 val &= ~AC_RECORD;
254 }
255
256 AUDIO_WRITE(nuc900_audio->mmio + ACTL_RESET, val);
257
258 break;
259 default:
260 ret = -EINVAL;
261 }
262
263 return ret;
264}
265
266static int nuc900_ac97_probe(struct snd_soc_dai *dai)
267{
268 struct nuc900_audio *nuc900_audio = nuc900_ac97_data;
269 unsigned long val;
270
271 mutex_lock(&ac97_mutex);
272
273
274 clk_enable(nuc900_audio->clk);
275
276
277 val = AUDIO_READ(nuc900_audio->mmio + ACTL_CON);
278 val |= (IIS_AC_PIN_SEL | ACLINK_EN);
279 AUDIO_WRITE(nuc900_audio->mmio + ACTL_CON, val);
280
281 mutex_unlock(&ac97_mutex);
282
283 return 0;
284}
285
286static int nuc900_ac97_remove(struct snd_soc_dai *dai)
287{
288 struct nuc900_audio *nuc900_audio = nuc900_ac97_data;
289
290 clk_disable(nuc900_audio->clk);
291 return 0;
292}
293
294static const struct snd_soc_dai_ops nuc900_ac97_dai_ops = {
295 .trigger = nuc900_ac97_trigger,
296};
297
298static struct snd_soc_dai_driver nuc900_ac97_dai = {
299 .probe = nuc900_ac97_probe,
300 .remove = nuc900_ac97_remove,
301 .bus_control = true,
302 .playback = {
303 .rates = SNDRV_PCM_RATE_8000_48000,
304 .formats = SNDRV_PCM_FMTBIT_S16_LE,
305 .channels_min = 1,
306 .channels_max = 2,
307 },
308 .capture = {
309 .rates = SNDRV_PCM_RATE_8000_48000,
310 .formats = SNDRV_PCM_FMTBIT_S16_LE,
311 .channels_min = 1,
312 .channels_max = 2,
313 },
314 .ops = &nuc900_ac97_dai_ops,
315};
316
317static const struct snd_soc_component_driver nuc900_ac97_component = {
318 .name = "nuc900-ac97",
319};
320
321static int nuc900_ac97_drvprobe(struct platform_device *pdev)
322{
323 struct nuc900_audio *nuc900_audio;
324 int ret;
325
326 if (nuc900_ac97_data)
327 return -EBUSY;
328
329 nuc900_audio = devm_kzalloc(&pdev->dev, sizeof(struct nuc900_audio),
330 GFP_KERNEL);
331 if (!nuc900_audio)
332 return -ENOMEM;
333
334 spin_lock_init(&nuc900_audio->lock);
335
336 nuc900_audio->res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
337 nuc900_audio->mmio = devm_ioremap_resource(&pdev->dev,
338 nuc900_audio->res);
339 if (IS_ERR(nuc900_audio->mmio))
340 return PTR_ERR(nuc900_audio->mmio);
341
342 nuc900_audio->clk = devm_clk_get(&pdev->dev, NULL);
343 if (IS_ERR(nuc900_audio->clk)) {
344 ret = PTR_ERR(nuc900_audio->clk);
345 goto out;
346 }
347
348 nuc900_audio->irq_num = platform_get_irq(pdev, 0);
349 if (!nuc900_audio->irq_num) {
350 ret = -EBUSY;
351 goto out;
352 }
353
354 nuc900_ac97_data = nuc900_audio;
355
356 ret = snd_soc_set_ac97_ops(&nuc900_ac97_ops);
357 if (ret)
358 goto out;
359
360 ret = snd_soc_register_component(&pdev->dev, &nuc900_ac97_component,
361 &nuc900_ac97_dai, 1);
362 if (ret)
363 goto out;
364
365
366 mfp_set_groupg(nuc900_audio->dev, NULL);
367
368 return 0;
369
370out:
371 snd_soc_set_ac97_ops(NULL);
372 return ret;
373}
374
375static int nuc900_ac97_drvremove(struct platform_device *pdev)
376{
377 snd_soc_unregister_component(&pdev->dev);
378
379 nuc900_ac97_data = NULL;
380 snd_soc_set_ac97_ops(NULL);
381
382 return 0;
383}
384
385static struct platform_driver nuc900_ac97_driver = {
386 .driver = {
387 .name = "nuc900-ac97",
388 },
389 .probe = nuc900_ac97_drvprobe,
390 .remove = nuc900_ac97_drvremove,
391};
392
393module_platform_driver(nuc900_ac97_driver);
394
395MODULE_AUTHOR("Wan ZongShun <mcuos.com@gmail.com>");
396MODULE_DESCRIPTION("NUC900 AC97 SoC driver!");
397MODULE_LICENSE("GPL");
398MODULE_ALIAS("platform:nuc900-ac97");
399
