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11#include <linux/init.h>
12#include <linux/module.h>
13#include <linux/slab.h>
14#include <linux/device.h>
15#include <linux/delay.h>
16#include <linux/mutex.h>
17#include <linux/suspend.h>
18#include <sound/core.h>
19#include <sound/pcm.h>
20#include <sound/initval.h>
21#include <sound/soc.h>
22#include <asm/mach-au1x00/au1000.h>
23#include <asm/mach-au1x00/au1xxx_psc.h>
24
25#include "psc.h"
26
27
28#define AC97_RW_RETRIES 5
29
30#define AC97_DIR \
31 (SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE)
32
33#define AC97_RATES \
34 SNDRV_PCM_RATE_8000_48000
35
36#define AC97_FMTS \
37 (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3BE)
38
39#define AC97PCR_START(stype) \
40 ((stype) == SNDRV_PCM_STREAM_PLAYBACK ? PSC_AC97PCR_TS : PSC_AC97PCR_RS)
41#define AC97PCR_STOP(stype) \
42 ((stype) == SNDRV_PCM_STREAM_PLAYBACK ? PSC_AC97PCR_TP : PSC_AC97PCR_RP)
43#define AC97PCR_CLRFIFO(stype) \
44 ((stype) == SNDRV_PCM_STREAM_PLAYBACK ? PSC_AC97PCR_TC : PSC_AC97PCR_RC)
45
46#define AC97STAT_BUSY(stype) \
47 ((stype) == SNDRV_PCM_STREAM_PLAYBACK ? PSC_AC97STAT_TB : PSC_AC97STAT_RB)
48
49
50static struct au1xpsc_audio_data *au1xpsc_ac97_workdata;
51
52#if 0
53
54
55
56
57
58static inline struct au1xpsc_audio_data *ac97_to_pscdata(struct snd_ac97 *x)
59{
60 struct snd_soc_card *c = x->bus->card->private_data;
61 return snd_soc_dai_get_drvdata(c->asoc_rtd_to_cpu(rtd, 0));
62}
63
64#else
65
66#define ac97_to_pscdata(x) au1xpsc_ac97_workdata
67
68#endif
69
70
71static unsigned short au1xpsc_ac97_read(struct snd_ac97 *ac97,
72 unsigned short reg)
73{
74 struct au1xpsc_audio_data *pscdata = ac97_to_pscdata(ac97);
75 unsigned short retry, tmo;
76 unsigned long data;
77
78 __raw_writel(PSC_AC97EVNT_CD, AC97_EVNT(pscdata));
79 wmb();
80
81 retry = AC97_RW_RETRIES;
82 do {
83 mutex_lock(&pscdata->lock);
84
85 __raw_writel(PSC_AC97CDC_RD | PSC_AC97CDC_INDX(reg),
86 AC97_CDC(pscdata));
87 wmb();
88
89 tmo = 20;
90 do {
91 udelay(21);
92 if (__raw_readl(AC97_EVNT(pscdata)) & PSC_AC97EVNT_CD)
93 break;
94 } while (--tmo);
95
96 data = __raw_readl(AC97_CDC(pscdata));
97
98 __raw_writel(PSC_AC97EVNT_CD, AC97_EVNT(pscdata));
99 wmb();
100
101 mutex_unlock(&pscdata->lock);
102
103 if (reg != ((data >> 16) & 0x7f))
104 tmo = 1;
105
106 } while (--retry && !tmo);
107
108 return retry ? data & 0xffff : 0xffff;
109}
110
111
112static void au1xpsc_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
113 unsigned short val)
114{
115 struct au1xpsc_audio_data *pscdata = ac97_to_pscdata(ac97);
116 unsigned int tmo, retry;
117
118 __raw_writel(PSC_AC97EVNT_CD, AC97_EVNT(pscdata));
119 wmb();
120
121 retry = AC97_RW_RETRIES;
122 do {
123 mutex_lock(&pscdata->lock);
124
125 __raw_writel(PSC_AC97CDC_INDX(reg) | (val & 0xffff),
126 AC97_CDC(pscdata));
127 wmb();
128
129 tmo = 20;
130 do {
131 udelay(21);
132 if (__raw_readl(AC97_EVNT(pscdata)) & PSC_AC97EVNT_CD)
133 break;
134 } while (--tmo);
135
136 __raw_writel(PSC_AC97EVNT_CD, AC97_EVNT(pscdata));
137 wmb();
138
139 mutex_unlock(&pscdata->lock);
140 } while (--retry && !tmo);
141}
142
143
144static void au1xpsc_ac97_warm_reset(struct snd_ac97 *ac97)
145{
146 struct au1xpsc_audio_data *pscdata = ac97_to_pscdata(ac97);
147
148 __raw_writel(PSC_AC97RST_SNC, AC97_RST(pscdata));
149 wmb();
150 msleep(10);
151 __raw_writel(0, AC97_RST(pscdata));
152 wmb();
153}
154
155static void au1xpsc_ac97_cold_reset(struct snd_ac97 *ac97)
156{
157 struct au1xpsc_audio_data *pscdata = ac97_to_pscdata(ac97);
158 int i;
159
160
161 __raw_writel(0, AC97_CFG(au1xpsc_ac97_workdata));
162 wmb();
163 __raw_writel(PSC_CTRL_DISABLE, PSC_CTRL(pscdata));
164 wmb();
165
166
167 __raw_writel(PSC_AC97RST_RST, AC97_RST(pscdata));
168 wmb();
169 msleep(500);
170 __raw_writel(0, AC97_RST(pscdata));
171 wmb();
172
173
174 __raw_writel(PSC_CTRL_ENABLE, PSC_CTRL(pscdata));
175 wmb();
176
177
178 i = 1000;
179 while (!((__raw_readl(AC97_STAT(pscdata)) & PSC_AC97STAT_SR)) && (--i))
180 msleep(1);
181
182 if (i == 0) {
183 printk(KERN_ERR "au1xpsc-ac97: PSC not ready!\n");
184 return;
185 }
186
187
188 __raw_writel(pscdata->cfg | PSC_AC97CFG_DE_ENABLE, AC97_CFG(pscdata));
189 wmb();
190
191
192 i = 1000;
193 while (!((__raw_readl(AC97_STAT(pscdata)) & PSC_AC97STAT_DR)) && (--i))
194 msleep(1);
195 if (i == 0)
196 printk(KERN_ERR "au1xpsc-ac97: AC97 ctrl not ready\n");
197}
198
199
200static struct snd_ac97_bus_ops psc_ac97_ops = {
201 .read = au1xpsc_ac97_read,
202 .write = au1xpsc_ac97_write,
203 .reset = au1xpsc_ac97_cold_reset,
204 .warm_reset = au1xpsc_ac97_warm_reset,
205};
206
207static int au1xpsc_ac97_hw_params(struct snd_pcm_substream *substream,
208 struct snd_pcm_hw_params *params,
209 struct snd_soc_dai *dai)
210{
211 struct au1xpsc_audio_data *pscdata = snd_soc_dai_get_drvdata(dai);
212 unsigned long r, ro, stat;
213 int chans, t, stype = substream->stream;
214
215 chans = params_channels(params);
216
217 r = ro = __raw_readl(AC97_CFG(pscdata));
218 stat = __raw_readl(AC97_STAT(pscdata));
219
220
221 if (stat & (PSC_AC97STAT_TB | PSC_AC97STAT_RB)) {
222
223 if ((PSC_AC97CFG_GET_LEN(r) != params->msbits) ||
224 (pscdata->rate != params_rate(params)))
225 return -EINVAL;
226 } else {
227
228
229 r &= ~PSC_AC97CFG_LEN_MASK;
230 r |= PSC_AC97CFG_SET_LEN(params->msbits);
231
232
233 if (stype == SNDRV_PCM_STREAM_PLAYBACK) {
234 r &= ~PSC_AC97CFG_TXSLOT_MASK;
235 r |= PSC_AC97CFG_TXSLOT_ENA(3);
236 r |= PSC_AC97CFG_TXSLOT_ENA(4);
237 } else {
238 r &= ~PSC_AC97CFG_RXSLOT_MASK;
239 r |= PSC_AC97CFG_RXSLOT_ENA(3);
240 r |= PSC_AC97CFG_RXSLOT_ENA(4);
241 }
242
243
244 if (!(r ^ ro))
245 goto out;
246
247
248 mutex_lock(&pscdata->lock);
249
250
251 __raw_writel(r & ~PSC_AC97CFG_DE_ENABLE, AC97_CFG(pscdata));
252 wmb();
253
254
255 t = 100;
256 while ((__raw_readl(AC97_STAT(pscdata)) & PSC_AC97STAT_DR) && --t)
257 msleep(1);
258
259 if (!t)
260 printk(KERN_ERR "PSC-AC97: can't disable!\n");
261
262
263 __raw_writel(r, AC97_CFG(pscdata));
264 wmb();
265
266
267 __raw_writel(r | PSC_AC97CFG_DE_ENABLE, AC97_CFG(pscdata));
268 wmb();
269
270
271 t = 100;
272 while ((!(__raw_readl(AC97_STAT(pscdata)) & PSC_AC97STAT_DR)) && --t)
273 msleep(1);
274
275 if (!t)
276 printk(KERN_ERR "PSC-AC97: can't enable!\n");
277
278 mutex_unlock(&pscdata->lock);
279
280 pscdata->cfg = r;
281 pscdata->rate = params_rate(params);
282 }
283
284out:
285 return 0;
286}
287
288static int au1xpsc_ac97_trigger(struct snd_pcm_substream *substream,
289 int cmd, struct snd_soc_dai *dai)
290{
291 struct au1xpsc_audio_data *pscdata = snd_soc_dai_get_drvdata(dai);
292 int ret, stype = substream->stream;
293
294 ret = 0;
295
296 switch (cmd) {
297 case SNDRV_PCM_TRIGGER_START:
298 case SNDRV_PCM_TRIGGER_RESUME:
299 __raw_writel(AC97PCR_CLRFIFO(stype), AC97_PCR(pscdata));
300 wmb();
301 __raw_writel(AC97PCR_START(stype), AC97_PCR(pscdata));
302 wmb();
303 break;
304 case SNDRV_PCM_TRIGGER_STOP:
305 case SNDRV_PCM_TRIGGER_SUSPEND:
306 __raw_writel(AC97PCR_STOP(stype), AC97_PCR(pscdata));
307 wmb();
308
309 while (__raw_readl(AC97_STAT(pscdata)) & AC97STAT_BUSY(stype))
310 asm volatile ("nop");
311
312 __raw_writel(AC97PCR_CLRFIFO(stype), AC97_PCR(pscdata));
313 wmb();
314
315 break;
316 default:
317 ret = -EINVAL;
318 }
319 return ret;
320}
321
322static int au1xpsc_ac97_startup(struct snd_pcm_substream *substream,
323 struct snd_soc_dai *dai)
324{
325 struct au1xpsc_audio_data *pscdata = snd_soc_dai_get_drvdata(dai);
326 snd_soc_dai_set_dma_data(dai, substream, &pscdata->dmaids[0]);
327 return 0;
328}
329
330static int au1xpsc_ac97_probe(struct snd_soc_dai *dai)
331{
332 return au1xpsc_ac97_workdata ? 0 : -ENODEV;
333}
334
335static const struct snd_soc_dai_ops au1xpsc_ac97_dai_ops = {
336 .startup = au1xpsc_ac97_startup,
337 .trigger = au1xpsc_ac97_trigger,
338 .hw_params = au1xpsc_ac97_hw_params,
339};
340
341static const struct snd_soc_dai_driver au1xpsc_ac97_dai_template = {
342 .probe = au1xpsc_ac97_probe,
343 .playback = {
344 .rates = AC97_RATES,
345 .formats = AC97_FMTS,
346 .channels_min = 2,
347 .channels_max = 2,
348 },
349 .capture = {
350 .rates = AC97_RATES,
351 .formats = AC97_FMTS,
352 .channels_min = 2,
353 .channels_max = 2,
354 },
355 .ops = &au1xpsc_ac97_dai_ops,
356};
357
358static const struct snd_soc_component_driver au1xpsc_ac97_component = {
359 .name = "au1xpsc-ac97",
360};
361
362static int au1xpsc_ac97_drvprobe(struct platform_device *pdev)
363{
364 int ret;
365 struct resource *dmares;
366 unsigned long sel;
367 struct au1xpsc_audio_data *wd;
368
369 wd = devm_kzalloc(&pdev->dev, sizeof(struct au1xpsc_audio_data),
370 GFP_KERNEL);
371 if (!wd)
372 return -ENOMEM;
373
374 mutex_init(&wd->lock);
375
376 wd->mmio = devm_platform_ioremap_resource(pdev, 0);
377 if (IS_ERR(wd->mmio))
378 return PTR_ERR(wd->mmio);
379
380 dmares = platform_get_resource(pdev, IORESOURCE_DMA, 0);
381 if (!dmares)
382 return -EBUSY;
383 wd->dmaids[SNDRV_PCM_STREAM_PLAYBACK] = dmares->start;
384
385 dmares = platform_get_resource(pdev, IORESOURCE_DMA, 1);
386 if (!dmares)
387 return -EBUSY;
388 wd->dmaids[SNDRV_PCM_STREAM_CAPTURE] = dmares->start;
389
390
391 wd->cfg = PSC_AC97CFG_RT_FIFO8 | PSC_AC97CFG_TT_FIFO8 |
392 PSC_AC97CFG_DE_ENABLE;
393
394
395 sel = __raw_readl(PSC_SEL(wd)) & PSC_SEL_CLK_MASK;
396 __raw_writel(PSC_CTRL_DISABLE, PSC_CTRL(wd));
397 wmb();
398 __raw_writel(0, PSC_SEL(wd));
399 wmb();
400 __raw_writel(PSC_SEL_PS_AC97MODE | sel, PSC_SEL(wd));
401 wmb();
402
403
404 memcpy(&wd->dai_drv, &au1xpsc_ac97_dai_template,
405 sizeof(struct snd_soc_dai_driver));
406 wd->dai_drv.name = dev_name(&pdev->dev);
407
408 platform_set_drvdata(pdev, wd);
409
410 ret = snd_soc_set_ac97_ops(&psc_ac97_ops);
411 if (ret)
412 return ret;
413
414 ret = snd_soc_register_component(&pdev->dev, &au1xpsc_ac97_component,
415 &wd->dai_drv, 1);
416 if (ret)
417 return ret;
418
419 au1xpsc_ac97_workdata = wd;
420 return 0;
421}
422
423static int au1xpsc_ac97_drvremove(struct platform_device *pdev)
424{
425 struct au1xpsc_audio_data *wd = platform_get_drvdata(pdev);
426
427 snd_soc_unregister_component(&pdev->dev);
428
429
430 __raw_writel(0, AC97_CFG(wd));
431 wmb();
432 __raw_writel(PSC_CTRL_DISABLE, PSC_CTRL(wd));
433 wmb();
434
435 au1xpsc_ac97_workdata = NULL;
436
437 return 0;
438}
439
440#ifdef CONFIG_PM
441static int au1xpsc_ac97_drvsuspend(struct device *dev)
442{
443 struct au1xpsc_audio_data *wd = dev_get_drvdata(dev);
444
445
446 wd->pm[0] = __raw_readl(PSC_SEL(wd));
447
448 __raw_writel(0, AC97_CFG(wd));
449 wmb();
450 __raw_writel(PSC_CTRL_DISABLE, PSC_CTRL(wd));
451 wmb();
452
453 return 0;
454}
455
456static int au1xpsc_ac97_drvresume(struct device *dev)
457{
458 struct au1xpsc_audio_data *wd = dev_get_drvdata(dev);
459
460
461 __raw_writel(wd->pm[0] | PSC_SEL_PS_AC97MODE, PSC_SEL(wd));
462 wmb();
463
464
465
466
467
468 return 0;
469}
470
471static const struct dev_pm_ops au1xpscac97_pmops = {
472 .suspend = au1xpsc_ac97_drvsuspend,
473 .resume = au1xpsc_ac97_drvresume,
474};
475
476#define AU1XPSCAC97_PMOPS &au1xpscac97_pmops
477
478#else
479
480#define AU1XPSCAC97_PMOPS NULL
481
482#endif
483
484static struct platform_driver au1xpsc_ac97_driver = {
485 .driver = {
486 .name = "au1xpsc_ac97",
487 .pm = AU1XPSCAC97_PMOPS,
488 },
489 .probe = au1xpsc_ac97_drvprobe,
490 .remove = au1xpsc_ac97_drvremove,
491};
492
493module_platform_driver(au1xpsc_ac97_driver);
494
495MODULE_LICENSE("GPL");
496MODULE_DESCRIPTION("Au12x0/Au1550 PSC AC97 ALSA ASoC audio driver");
497MODULE_AUTHOR("Manuel Lauss");
498
499