Commit | Line | Data |
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1082e270 WZ |
1 | /* |
2 | * Copyright (c) 2009-2010 Nuvoton technology corporation. | |
3 | * | |
4 | * Wan ZongShun <mcuos.com@gmail.com> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation;version 2 of the License. | |
9 | * | |
10 | */ | |
11 | ||
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> | |
1082e270 WZ |
23 | #include <linux/clk.h> |
24 | ||
25 | #include <mach/mfp.h> | |
26 | ||
0dc3b442 | 27 | #include "nuc900-audio.h" |
1082e270 WZ |
28 | |
29 | static DEFINE_MUTEX(ac97_mutex); | |
30 | struct nuc900_audio *nuc900_ac97_data; | |
31 | ||
32 | static int nuc900_checkready(void) | |
33 | { | |
34 | struct nuc900_audio *nuc900_audio = nuc900_ac97_data; | |
35 | ||
36 | if (!(AUDIO_READ(nuc900_audio->mmio + ACTL_ACIS0) & CODEC_READY)) | |
37 | return -EPERM; | |
38 | ||
39 | return 0; | |
40 | } | |
41 | ||
42 | /* AC97 controller reads codec register */ | |
43 | static unsigned short nuc900_ac97_read(struct snd_ac97 *ac97, | |
44 | unsigned short reg) | |
45 | { | |
46 | struct nuc900_audio *nuc900_audio = nuc900_ac97_data; | |
47 | unsigned long timeout = 0x10000, val; | |
48 | ||
49 | mutex_lock(&ac97_mutex); | |
50 | ||
51 | val = nuc900_checkready(); | |
3f90e502 | 52 | if (val) { |
1082e270 WZ |
53 | dev_err(nuc900_audio->dev, "AC97 codec is not ready\n"); |
54 | goto out; | |
55 | } | |
56 | ||
57 | /* set the R_WB bit and write register index */ | |
58 | AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACOS1, R_WB | reg); | |
59 | ||
60 | /* set the valid frame bit and valid slots */ | |
61 | val = AUDIO_READ(nuc900_audio->mmio + ACTL_ACOS0); | |
62 | val |= (VALID_FRAME | SLOT1_VALID); | |
63 | AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACOS0, val); | |
64 | ||
65 | udelay(100); | |
66 | ||
67 | /* polling the AC_R_FINISH */ | |
8dfb0c78 WZ |
68 | while (!(AUDIO_READ(nuc900_audio->mmio + ACTL_ACCON) & AC_R_FINISH) |
69 | && timeout--) | |
1082e270 WZ |
70 | mdelay(1); |
71 | ||
72 | if (!timeout) { | |
73 | dev_err(nuc900_audio->dev, "AC97 read register time out !\n"); | |
74 | val = -EPERM; | |
75 | goto out; | |
76 | } | |
77 | ||
78 | val = AUDIO_READ(nuc900_audio->mmio + ACTL_ACOS0) ; | |
79 | val &= ~SLOT1_VALID; | |
80 | AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACOS0, val); | |
81 | ||
82 | if (AUDIO_READ(nuc900_audio->mmio + ACTL_ACIS1) >> 2 != reg) { | |
83 | dev_err(nuc900_audio->dev, | |
84 | "R_INDEX of REG_ACTL_ACIS1 not match!\n"); | |
85 | } | |
86 | ||
87 | udelay(100); | |
88 | val = (AUDIO_READ(nuc900_audio->mmio + ACTL_ACIS2) & 0xFFFF); | |
89 | ||
90 | out: | |
91 | mutex_unlock(&ac97_mutex); | |
92 | return val; | |
93 | } | |
94 | ||
95 | /* AC97 controller writes to codec register */ | |
96 | static void nuc900_ac97_write(struct snd_ac97 *ac97, unsigned short reg, | |
97 | unsigned short val) | |
98 | { | |
99 | struct nuc900_audio *nuc900_audio = nuc900_ac97_data; | |
100 | unsigned long tmp, timeout = 0x10000; | |
101 | ||
102 | mutex_lock(&ac97_mutex); | |
103 | ||
104 | tmp = nuc900_checkready(); | |
3f90e502 | 105 | if (tmp) |
1082e270 WZ |
106 | dev_err(nuc900_audio->dev, "AC97 codec is not ready\n"); |
107 | ||
108 | /* clear the R_WB bit and write register index */ | |
109 | AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACOS1, reg); | |
110 | ||
111 | /* write register value */ | |
112 | AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACOS2, val); | |
113 | ||
114 | /* set the valid frame bit and valid slots */ | |
115 | tmp = AUDIO_READ(nuc900_audio->mmio + ACTL_ACOS0); | |
116 | tmp |= SLOT1_VALID | SLOT2_VALID | VALID_FRAME; | |
117 | AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACOS0, tmp); | |
118 | ||
119 | udelay(100); | |
120 | ||
121 | /* polling the AC_W_FINISH */ | |
8dfb0c78 WZ |
122 | while ((AUDIO_READ(nuc900_audio->mmio + ACTL_ACCON) & AC_W_FINISH) |
123 | && timeout--) | |
1082e270 WZ |
124 | mdelay(1); |
125 | ||
126 | if (!timeout) | |
127 | dev_err(nuc900_audio->dev, "AC97 write register time out !\n"); | |
128 | ||
129 | tmp = AUDIO_READ(nuc900_audio->mmio + ACTL_ACOS0); | |
130 | tmp &= ~(SLOT1_VALID | SLOT2_VALID); | |
131 | AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACOS0, tmp); | |
132 | ||
133 | mutex_unlock(&ac97_mutex); | |
134 | ||
135 | } | |
136 | ||
137 | static void nuc900_ac97_warm_reset(struct snd_ac97 *ac97) | |
138 | { | |
139 | struct nuc900_audio *nuc900_audio = nuc900_ac97_data; | |
140 | unsigned long val; | |
141 | ||
142 | mutex_lock(&ac97_mutex); | |
143 | ||
144 | /* warm reset AC 97 */ | |
145 | val = AUDIO_READ(nuc900_audio->mmio + ACTL_ACCON); | |
146 | val |= AC_W_RES; | |
147 | AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACCON, val); | |
148 | ||
08a0b717 | 149 | udelay(100); |
1082e270 WZ |
150 | |
151 | val = nuc900_checkready(); | |
3f90e502 | 152 | if (val) |
1082e270 WZ |
153 | dev_err(nuc900_audio->dev, "AC97 codec is not ready\n"); |
154 | ||
155 | mutex_unlock(&ac97_mutex); | |
156 | } | |
157 | ||
158 | static void nuc900_ac97_cold_reset(struct snd_ac97 *ac97) | |
159 | { | |
160 | struct nuc900_audio *nuc900_audio = nuc900_ac97_data; | |
161 | unsigned long val; | |
162 | ||
163 | mutex_lock(&ac97_mutex); | |
164 | ||
165 | /* reset Audio Controller */ | |
166 | val = AUDIO_READ(nuc900_audio->mmio + ACTL_RESET); | |
167 | val |= ACTL_RESET_BIT; | |
168 | AUDIO_WRITE(nuc900_audio->mmio + ACTL_RESET, val); | |
169 | ||
1082e270 WZ |
170 | val = AUDIO_READ(nuc900_audio->mmio + ACTL_RESET); |
171 | val &= (~ACTL_RESET_BIT); | |
172 | AUDIO_WRITE(nuc900_audio->mmio + ACTL_RESET, val); | |
173 | ||
1082e270 WZ |
174 | /* reset AC-link interface */ |
175 | ||
176 | val = AUDIO_READ(nuc900_audio->mmio + ACTL_RESET); | |
177 | val |= AC_RESET; | |
178 | AUDIO_WRITE(nuc900_audio->mmio + ACTL_RESET, val); | |
179 | ||
1082e270 WZ |
180 | val = AUDIO_READ(nuc900_audio->mmio + ACTL_RESET); |
181 | val &= ~AC_RESET; | |
182 | AUDIO_WRITE(nuc900_audio->mmio + ACTL_RESET, val); | |
183 | ||
1082e270 WZ |
184 | /* cold reset AC 97 */ |
185 | val = AUDIO_READ(nuc900_audio->mmio + ACTL_ACCON); | |
186 | val |= AC_C_RES; | |
187 | AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACCON, val); | |
188 | ||
1082e270 WZ |
189 | val = AUDIO_READ(nuc900_audio->mmio + ACTL_ACCON); |
190 | val &= (~AC_C_RES); | |
191 | AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACCON, val); | |
192 | ||
08a0b717 | 193 | udelay(100); |
1082e270 WZ |
194 | |
195 | mutex_unlock(&ac97_mutex); | |
196 | ||
197 | } | |
198 | ||
199 | /* AC97 controller operations */ | |
200 | struct snd_ac97_bus_ops soc_ac97_ops = { | |
201 | .read = nuc900_ac97_read, | |
202 | .write = nuc900_ac97_write, | |
203 | .reset = nuc900_ac97_cold_reset, | |
204 | .warm_reset = nuc900_ac97_warm_reset, | |
205 | } | |
206 | EXPORT_SYMBOL_GPL(soc_ac97_ops); | |
207 | ||
208 | static 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; | |
018334c0 | 212 | int ret; |
1082e270 WZ |
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); | |
018334c0 | 221 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
1082e270 WZ |
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); | |
018334c0 | 244 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
1082e270 WZ |
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 | ||
e3edefbd | 266 | static int nuc900_ac97_probe(struct snd_soc_dai *dai) |
1082e270 WZ |
267 | { |
268 | struct nuc900_audio *nuc900_audio = nuc900_ac97_data; | |
269 | unsigned long val; | |
270 | ||
271 | mutex_lock(&ac97_mutex); | |
272 | ||
273 | /* enable unit clock */ | |
274 | clk_enable(nuc900_audio->clk); | |
275 | ||
276 | /* enable audio controller and AC-link interface */ | |
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 | ||
e3edefbd | 286 | static int nuc900_ac97_remove(struct snd_soc_dai *dai) |
1082e270 WZ |
287 | { |
288 | struct nuc900_audio *nuc900_audio = nuc900_ac97_data; | |
289 | ||
290 | clk_disable(nuc900_audio->clk); | |
e3edefbd | 291 | return 0; |
1082e270 WZ |
292 | } |
293 | ||
294 | static struct snd_soc_dai_ops nuc900_ac97_dai_ops = { | |
295 | .trigger = nuc900_ac97_trigger, | |
296 | }; | |
297 | ||
f0fba2ad | 298 | static struct snd_soc_dai_driver nuc900_ac97_dai = { |
1082e270 WZ |
299 | .probe = nuc900_ac97_probe, |
300 | .remove = nuc900_ac97_remove, | |
301 | .ac97_control = 1, | |
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, | |
5a8f1d47 | 315 | }; |
1082e270 WZ |
316 | |
317 | static int __devinit nuc900_ac97_drvprobe(struct platform_device *pdev) | |
318 | { | |
319 | struct nuc900_audio *nuc900_audio; | |
320 | int ret; | |
321 | ||
322 | if (nuc900_ac97_data) | |
323 | return -EBUSY; | |
324 | ||
325 | nuc900_audio = kzalloc(sizeof(struct nuc900_audio), GFP_KERNEL); | |
326 | if (!nuc900_audio) | |
327 | return -ENOMEM; | |
328 | ||
329 | spin_lock_init(&nuc900_audio->lock); | |
330 | ||
331 | nuc900_audio->res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
332 | if (!nuc900_audio->res) { | |
333 | ret = -ENODEV; | |
334 | goto out0; | |
335 | } | |
336 | ||
337 | if (!request_mem_region(nuc900_audio->res->start, | |
338 | resource_size(nuc900_audio->res), pdev->name)) { | |
339 | ret = -EBUSY; | |
340 | goto out0; | |
341 | } | |
342 | ||
343 | nuc900_audio->mmio = ioremap(nuc900_audio->res->start, | |
344 | resource_size(nuc900_audio->res)); | |
345 | if (!nuc900_audio->mmio) { | |
346 | ret = -ENOMEM; | |
347 | goto out1; | |
348 | } | |
349 | ||
350 | nuc900_audio->clk = clk_get(&pdev->dev, NULL); | |
351 | if (IS_ERR(nuc900_audio->clk)) { | |
352 | ret = PTR_ERR(nuc900_audio->clk); | |
353 | goto out2; | |
354 | } | |
355 | ||
356 | nuc900_audio->irq_num = platform_get_irq(pdev, 0); | |
357 | if (!nuc900_audio->irq_num) { | |
358 | ret = -EBUSY; | |
359 | goto out2; | |
360 | } | |
361 | ||
362 | nuc900_ac97_data = nuc900_audio; | |
363 | ||
f0fba2ad | 364 | ret = snd_soc_register_dai(&pdev->dev, &nuc900_ac97_dai); |
1082e270 WZ |
365 | if (ret) |
366 | goto out3; | |
367 | ||
368 | mfp_set_groupg(nuc900_audio->dev); /* enbale ac97 multifunction pin*/ | |
369 | ||
370 | return 0; | |
371 | ||
372 | out3: | |
373 | clk_put(nuc900_audio->clk); | |
374 | out2: | |
375 | iounmap(nuc900_audio->mmio); | |
376 | out1: | |
377 | release_mem_region(nuc900_audio->res->start, | |
378 | resource_size(nuc900_audio->res)); | |
379 | out0: | |
380 | kfree(nuc900_audio); | |
381 | return ret; | |
382 | } | |
383 | ||
384 | static int __devexit nuc900_ac97_drvremove(struct platform_device *pdev) | |
385 | { | |
f0fba2ad | 386 | snd_soc_unregister_dai(&pdev->dev); |
1082e270 WZ |
387 | |
388 | clk_put(nuc900_ac97_data->clk); | |
389 | iounmap(nuc900_ac97_data->mmio); | |
390 | release_mem_region(nuc900_ac97_data->res->start, | |
391 | resource_size(nuc900_ac97_data->res)); | |
392 | ||
d6f443ae | 393 | kfree(nuc900_ac97_data); |
1082e270 WZ |
394 | nuc900_ac97_data = NULL; |
395 | ||
396 | return 0; | |
397 | } | |
398 | ||
399 | static struct platform_driver nuc900_ac97_driver = { | |
400 | .driver = { | |
f0fba2ad | 401 | .name = "nuc900-ac97", |
1082e270 WZ |
402 | .owner = THIS_MODULE, |
403 | }, | |
404 | .probe = nuc900_ac97_drvprobe, | |
405 | .remove = __devexit_p(nuc900_ac97_drvremove), | |
406 | }; | |
407 | ||
408 | static int __init nuc900_ac97_init(void) | |
409 | { | |
410 | return platform_driver_register(&nuc900_ac97_driver); | |
411 | } | |
412 | ||
413 | static void __exit nuc900_ac97_exit(void) | |
414 | { | |
415 | platform_driver_unregister(&nuc900_ac97_driver); | |
416 | } | |
417 | ||
418 | module_init(nuc900_ac97_init); | |
419 | module_exit(nuc900_ac97_exit); | |
420 | ||
421 | MODULE_AUTHOR("Wan ZongShun <mcuos.com@gmail.com>"); | |
422 | MODULE_DESCRIPTION("NUC900 AC97 SoC driver!"); | |
423 | MODULE_LICENSE("GPL"); | |
424 | MODULE_ALIAS("platform:nuc900-ac97"); |