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18#include <linux/init.h>
19#include <linux/module.h>
20#include <linux/device.h>
21#include <linux/delay.h>
22#include <linux/suspend.h>
23#include <sound/core.h>
24#include <sound/pcm.h>
25#include <sound/initval.h>
26#include <sound/soc.h>
27#include <asm/mach-au1x00/au1000.h>
28#include <asm/mach-au1x00/au1xxx_psc.h>
29
30#include "psc.h"
31
32#define AC97_DIR \
33 (SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE)
34
35#define AC97_RATES \
36 SNDRV_PCM_RATE_8000_48000
37
38#define AC97_FMTS \
39 (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3BE)
40
41#define AC97PCR_START(stype) \
42 ((stype) == PCM_TX ? PSC_AC97PCR_TS : PSC_AC97PCR_RS)
43#define AC97PCR_STOP(stype) \
44 ((stype) == PCM_TX ? PSC_AC97PCR_TP : PSC_AC97PCR_RP)
45#define AC97PCR_CLRFIFO(stype) \
46 ((stype) == PCM_TX ? PSC_AC97PCR_TC : PSC_AC97PCR_RC)
47
48
49static struct au1xpsc_audio_data *au1xpsc_ac97_workdata;
50
51
52static unsigned short au1xpsc_ac97_read(struct snd_ac97 *ac97,
53 unsigned short reg)
54{
55
56 struct au1xpsc_audio_data *pscdata = au1xpsc_ac97_workdata;
57 unsigned short data, tmo;
58
59 au_writel(PSC_AC97CDC_RD | PSC_AC97CDC_INDX(reg), AC97_CDC(pscdata));
60 au_sync();
61
62 tmo = 1000;
63 while ((!(au_readl(AC97_EVNT(pscdata)) & PSC_AC97EVNT_CD)) && --tmo)
64 udelay(2);
65
66 if (!tmo)
67 data = 0xffff;
68 else
69 data = au_readl(AC97_CDC(pscdata)) & 0xffff;
70
71 au_writel(PSC_AC97EVNT_CD, AC97_EVNT(pscdata));
72 au_sync();
73
74 return data;
75}
76
77
78static void au1xpsc_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
79 unsigned short val)
80{
81
82 struct au1xpsc_audio_data *pscdata = au1xpsc_ac97_workdata;
83 unsigned int tmo;
84
85 au_writel(PSC_AC97CDC_INDX(reg) | (val & 0xffff), AC97_CDC(pscdata));
86 au_sync();
87 tmo = 1000;
88 while ((!(au_readl(AC97_EVNT(pscdata)) & PSC_AC97EVNT_CD)) && --tmo)
89 au_sync();
90
91 au_writel(PSC_AC97EVNT_CD, AC97_EVNT(pscdata));
92 au_sync();
93}
94
95
96static void au1xpsc_ac97_warm_reset(struct snd_ac97 *ac97)
97{
98
99 struct au1xpsc_audio_data *pscdata = au1xpsc_ac97_workdata;
100
101 au_writel(PSC_AC97RST_SNC, AC97_RST(pscdata));
102 au_sync();
103 msleep(10);
104 au_writel(0, AC97_RST(pscdata));
105 au_sync();
106}
107
108static void au1xpsc_ac97_cold_reset(struct snd_ac97 *ac97)
109{
110
111 struct au1xpsc_audio_data *pscdata = au1xpsc_ac97_workdata;
112 int i;
113
114
115 au_writel(0, AC97_CFG(au1xpsc_ac97_workdata));
116 au_sync();
117 au_writel(PSC_CTRL_DISABLE, PSC_CTRL(pscdata));
118 au_sync();
119
120
121 au_writel(PSC_AC97RST_RST, AC97_RST(pscdata));
122 au_sync();
123 msleep(500);
124 au_writel(0, AC97_RST(pscdata));
125 au_sync();
126
127
128 au_writel(PSC_CTRL_ENABLE, PSC_CTRL(pscdata));
129 au_sync();
130
131
132 i = 100000;
133 while (!((au_readl(AC97_STAT(pscdata)) & PSC_AC97STAT_SR)) && (--i))
134 au_sync();
135
136 if (i == 0) {
137 printk(KERN_ERR "au1xpsc-ac97: PSC not ready!\n");
138 return;
139 }
140
141
142 au_writel(pscdata->cfg | PSC_AC97CFG_DE_ENABLE, AC97_CFG(pscdata));
143 au_sync();
144
145
146 i = 100000;
147 while (!((au_readl(AC97_STAT(pscdata)) & PSC_AC97STAT_DR)) && (--i))
148 au_sync();
149 if (i == 0)
150 printk(KERN_ERR "au1xpsc-ac97: AC97 ctrl not ready\n");
151}
152
153
154struct snd_ac97_bus_ops soc_ac97_ops = {
155 .read = au1xpsc_ac97_read,
156 .write = au1xpsc_ac97_write,
157 .reset = au1xpsc_ac97_cold_reset,
158 .warm_reset = au1xpsc_ac97_warm_reset,
159};
160EXPORT_SYMBOL_GPL(soc_ac97_ops);
161
162static int au1xpsc_ac97_hw_params(struct snd_pcm_substream *substream,
163 struct snd_pcm_hw_params *params,
164 struct snd_soc_dai *dai)
165{
166
167 struct au1xpsc_audio_data *pscdata = au1xpsc_ac97_workdata;
168 unsigned long r, stat;
169 int chans, stype = SUBSTREAM_TYPE(substream);
170
171 chans = params_channels(params);
172
173 r = au_readl(AC97_CFG(pscdata));
174 stat = au_readl(AC97_STAT(pscdata));
175
176
177 if (stat & (PSC_AC97STAT_TB | PSC_AC97STAT_RB)) {
178
179 if ((PSC_AC97CFG_GET_LEN(r) != params->msbits) ||
180 (pscdata->rate != params_rate(params)))
181 return -EINVAL;
182 } else {
183
184 au_writel(r & ~PSC_AC97CFG_DE_ENABLE, AC97_CFG(pscdata));
185 au_sync();
186
187
188 r &= ~PSC_AC97CFG_LEN_MASK;
189 r |= PSC_AC97CFG_SET_LEN(params->msbits);
190
191
192 if (stype == PCM_TX) {
193 r &= ~PSC_AC97CFG_TXSLOT_MASK;
194 r |= PSC_AC97CFG_TXSLOT_ENA(3);
195 r |= PSC_AC97CFG_TXSLOT_ENA(4);
196 } else {
197 r &= ~PSC_AC97CFG_RXSLOT_MASK;
198 r |= PSC_AC97CFG_RXSLOT_ENA(3);
199 r |= PSC_AC97CFG_RXSLOT_ENA(4);
200 }
201
202
203 au_writel(r | PSC_AC97CFG_DE_ENABLE, AC97_CFG(pscdata));
204 au_sync();
205
206 pscdata->cfg = r;
207 pscdata->rate = params_rate(params);
208 }
209
210 return 0;
211}
212
213static int au1xpsc_ac97_trigger(struct snd_pcm_substream *substream,
214 int cmd, struct snd_soc_dai *dai)
215{
216
217 struct au1xpsc_audio_data *pscdata = au1xpsc_ac97_workdata;
218 int ret, stype = SUBSTREAM_TYPE(substream);
219
220 ret = 0;
221
222 switch (cmd) {
223 case SNDRV_PCM_TRIGGER_START:
224 case SNDRV_PCM_TRIGGER_RESUME:
225 au_writel(AC97PCR_START(stype), AC97_PCR(pscdata));
226 au_sync();
227 break;
228 case SNDRV_PCM_TRIGGER_STOP:
229 case SNDRV_PCM_TRIGGER_SUSPEND:
230 au_writel(AC97PCR_STOP(stype), AC97_PCR(pscdata));
231 au_sync();
232 break;
233 default:
234 ret = -EINVAL;
235 }
236 return ret;
237}
238
239static int au1xpsc_ac97_probe(struct platform_device *pdev,
240 struct snd_soc_dai *dai)
241{
242 int ret;
243 struct resource *r;
244 unsigned long sel;
245
246 if (au1xpsc_ac97_workdata)
247 return -EBUSY;
248
249 au1xpsc_ac97_workdata =
250 kzalloc(sizeof(struct au1xpsc_audio_data), GFP_KERNEL);
251 if (!au1xpsc_ac97_workdata)
252 return -ENOMEM;
253
254 r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
255 if (!r) {
256 ret = -ENODEV;
257 goto out0;
258 }
259
260 ret = -EBUSY;
261 au1xpsc_ac97_workdata->ioarea =
262 request_mem_region(r->start, r->end - r->start + 1,
263 "au1xpsc_ac97");
264 if (!au1xpsc_ac97_workdata->ioarea)
265 goto out0;
266
267 au1xpsc_ac97_workdata->mmio = ioremap(r->start, 0xffff);
268 if (!au1xpsc_ac97_workdata->mmio)
269 goto out1;
270
271
272 au1xpsc_ac97_workdata->cfg = PSC_AC97CFG_RT_FIFO8 |
273 PSC_AC97CFG_TT_FIFO8 |
274 PSC_AC97CFG_DE_ENABLE;
275
276
277
278
279 sel = au_readl(PSC_SEL(au1xpsc_ac97_workdata)) & PSC_SEL_CLK_MASK;
280 au_writel(PSC_CTRL_DISABLE, PSC_CTRL(au1xpsc_ac97_workdata));
281 au_sync();
282 au_writel(0, PSC_SEL(au1xpsc_ac97_workdata));
283 au_sync();
284 au_writel(PSC_SEL_PS_AC97MODE | sel, PSC_SEL(au1xpsc_ac97_workdata));
285 au_sync();
286
287
288
289
290 return 0;
291
292out1:
293 release_resource(au1xpsc_ac97_workdata->ioarea);
294 kfree(au1xpsc_ac97_workdata->ioarea);
295out0:
296 kfree(au1xpsc_ac97_workdata);
297 au1xpsc_ac97_workdata = NULL;
298 return ret;
299}
300
301static void au1xpsc_ac97_remove(struct platform_device *pdev,
302 struct snd_soc_dai *dai)
303{
304
305 au_writel(0, AC97_CFG(au1xpsc_ac97_workdata));
306 au_sync();
307 au_writel(PSC_CTRL_DISABLE, PSC_CTRL(au1xpsc_ac97_workdata));
308 au_sync();
309
310 iounmap(au1xpsc_ac97_workdata->mmio);
311 release_resource(au1xpsc_ac97_workdata->ioarea);
312 kfree(au1xpsc_ac97_workdata->ioarea);
313 kfree(au1xpsc_ac97_workdata);
314 au1xpsc_ac97_workdata = NULL;
315}
316
317static int au1xpsc_ac97_suspend(struct snd_soc_dai *dai)
318{
319
320 au1xpsc_ac97_workdata->pm[0] =
321 au_readl(PSC_SEL(au1xpsc_ac97_workdata));
322
323 au_writel(0, AC97_CFG(au1xpsc_ac97_workdata));
324 au_sync();
325 au_writel(PSC_CTRL_DISABLE, PSC_CTRL(au1xpsc_ac97_workdata));
326 au_sync();
327
328 return 0;
329}
330
331static int au1xpsc_ac97_resume(struct snd_soc_dai *dai)
332{
333
334 au_writel(au1xpsc_ac97_workdata->pm[0] | PSC_SEL_PS_AC97MODE,
335 PSC_SEL(au1xpsc_ac97_workdata));
336 au_sync();
337
338
339
340
341
342 return 0;
343}
344
345static struct snd_soc_dai_ops au1xpsc_ac97_dai_ops = {
346 .trigger = au1xpsc_ac97_trigger,
347 .hw_params = au1xpsc_ac97_hw_params,
348};
349
350struct snd_soc_dai au1xpsc_ac97_dai = {
351 .name = "au1xpsc_ac97",
352 .ac97_control = 1,
353 .probe = au1xpsc_ac97_probe,
354 .remove = au1xpsc_ac97_remove,
355 .suspend = au1xpsc_ac97_suspend,
356 .resume = au1xpsc_ac97_resume,
357 .playback = {
358 .rates = AC97_RATES,
359 .formats = AC97_FMTS,
360 .channels_min = 2,
361 .channels_max = 2,
362 },
363 .capture = {
364 .rates = AC97_RATES,
365 .formats = AC97_FMTS,
366 .channels_min = 2,
367 .channels_max = 2,
368 },
369 .ops = &au1xpsc_ac97_dai_ops,
370};
371EXPORT_SYMBOL_GPL(au1xpsc_ac97_dai);
372
373static int __init au1xpsc_ac97_init(void)
374{
375 au1xpsc_ac97_workdata = NULL;
376 return snd_soc_register_dai(&au1xpsc_ac97_dai);
377}
378
379static void __exit au1xpsc_ac97_exit(void)
380{
381 snd_soc_unregister_dai(&au1xpsc_ac97_dai);
382}
383
384module_init(au1xpsc_ac97_init);
385module_exit(au1xpsc_ac97_exit);
386
387MODULE_LICENSE("GPL");
388MODULE_DESCRIPTION("Au12x0/Au1550 PSC AC97 ALSA ASoC audio driver");
389MODULE_AUTHOR("Manuel Lauss <mano@roarinelk.homelinux.net>");
390
