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10#include <linux/clk.h>
11#include <linux/init.h>
12#include <linux/kernel.h>
13#include <linux/module.h>
14#include <linux/of.h>
15#include <linux/platform_device.h>
16#include <linux/pm_runtime.h>
17#include <linux/reset.h>
18
19#include <sound/core.h>
20#include <sound/dmaengine_pcm.h>
21#include <sound/initval.h>
22#include <sound/pcm.h>
23#include <sound/pcm_params.h>
24#include <sound/soc.h>
25
26#define IMG_SPDIF_IN_RX_FIFO_OFFSET 0
27
28#define IMG_SPDIF_IN_CTL 0x4
29#define IMG_SPDIF_IN_CTL_LOCKLO_MASK 0xff
30#define IMG_SPDIF_IN_CTL_LOCKLO_SHIFT 0
31#define IMG_SPDIF_IN_CTL_LOCKHI_MASK 0xff00
32#define IMG_SPDIF_IN_CTL_LOCKHI_SHIFT 8
33#define IMG_SPDIF_IN_CTL_TRK_MASK 0xff0000
34#define IMG_SPDIF_IN_CTL_TRK_SHIFT 16
35#define IMG_SPDIF_IN_CTL_SRD_MASK 0x70000000
36#define IMG_SPDIF_IN_CTL_SRD_SHIFT 28
37#define IMG_SPDIF_IN_CTL_SRT_MASK BIT(31)
38
39#define IMG_SPDIF_IN_STATUS 0x8
40#define IMG_SPDIF_IN_STATUS_SAM_MASK 0x7000
41#define IMG_SPDIF_IN_STATUS_SAM_SHIFT 12
42#define IMG_SPDIF_IN_STATUS_LOCK_MASK BIT(15)
43#define IMG_SPDIF_IN_STATUS_LOCK_SHIFT 15
44
45#define IMG_SPDIF_IN_CLKGEN 0x1c
46#define IMG_SPDIF_IN_CLKGEN_NOM_MASK 0x3ff
47#define IMG_SPDIF_IN_CLKGEN_NOM_SHIFT 0
48#define IMG_SPDIF_IN_CLKGEN_HLD_MASK 0x3ff0000
49#define IMG_SPDIF_IN_CLKGEN_HLD_SHIFT 16
50
51#define IMG_SPDIF_IN_CSL 0x20
52
53#define IMG_SPDIF_IN_CSH 0x24
54#define IMG_SPDIF_IN_CSH_MASK 0xff
55#define IMG_SPDIF_IN_CSH_SHIFT 0
56
57#define IMG_SPDIF_IN_SOFT_RESET 0x28
58#define IMG_SPDIF_IN_SOFT_RESET_MASK BIT(0)
59
60#define IMG_SPDIF_IN_ACLKGEN_START 0x2c
61#define IMG_SPDIF_IN_ACLKGEN_NOM_MASK 0x3ff
62#define IMG_SPDIF_IN_ACLKGEN_NOM_SHIFT 0
63#define IMG_SPDIF_IN_ACLKGEN_HLD_MASK 0xffc00
64#define IMG_SPDIF_IN_ACLKGEN_HLD_SHIFT 10
65#define IMG_SPDIF_IN_ACLKGEN_TRK_MASK 0xff00000
66#define IMG_SPDIF_IN_ACLKGEN_TRK_SHIFT 20
67
68#define IMG_SPDIF_IN_NUM_ACLKGEN 4
69
70struct img_spdif_in {
71 spinlock_t lock;
72 void __iomem *base;
73 struct clk *clk_sys;
74 struct snd_dmaengine_dai_dma_data dma_data;
75 struct device *dev;
76 unsigned int trk;
77 bool multi_freq;
78 int lock_acquire;
79 int lock_release;
80 unsigned int single_freq;
81 unsigned int multi_freqs[IMG_SPDIF_IN_NUM_ACLKGEN];
82 bool active;
83 u32 suspend_clkgen;
84 u32 suspend_ctl;
85
86
87 unsigned int aclkgen_regs[IMG_SPDIF_IN_NUM_ACLKGEN];
88};
89
90static int img_spdif_in_runtime_suspend(struct device *dev)
91{
92 struct img_spdif_in *spdif = dev_get_drvdata(dev);
93
94 clk_disable_unprepare(spdif->clk_sys);
95
96 return 0;
97}
98
99static int img_spdif_in_runtime_resume(struct device *dev)
100{
101 struct img_spdif_in *spdif = dev_get_drvdata(dev);
102 int ret;
103
104 ret = clk_prepare_enable(spdif->clk_sys);
105 if (ret) {
106 dev_err(dev, "Unable to enable sys clock\n");
107 return ret;
108 }
109
110 return 0;
111}
112
113static inline void img_spdif_in_writel(struct img_spdif_in *spdif,
114 u32 val, u32 reg)
115{
116 writel(val, spdif->base + reg);
117}
118
119static inline u32 img_spdif_in_readl(struct img_spdif_in *spdif, u32 reg)
120{
121 return readl(spdif->base + reg);
122}
123
124static inline void img_spdif_in_aclkgen_writel(struct img_spdif_in *spdif,
125 u32 index)
126{
127 img_spdif_in_writel(spdif, spdif->aclkgen_regs[index],
128 IMG_SPDIF_IN_ACLKGEN_START + (index * 0x4));
129}
130
131static int img_spdif_in_check_max_rate(struct img_spdif_in *spdif,
132 unsigned int sample_rate, unsigned long *actual_freq)
133{
134 unsigned long min_freq, freq_t;
135
136
137 min_freq = sample_rate * 2 * 32 * 24;
138
139 freq_t = clk_get_rate(spdif->clk_sys);
140
141 if (freq_t < min_freq)
142 return -EINVAL;
143
144 *actual_freq = freq_t;
145
146 return 0;
147}
148
149static int img_spdif_in_do_clkgen_calc(unsigned int rate, unsigned int *pnom,
150 unsigned int *phld, unsigned long clk_rate)
151{
152 unsigned int ori, nom, hld;
153
154
155
156
157
158
159 if (!rate)
160 return -EINVAL;
161
162 ori = clk_rate / (rate * 64);
163
164 if (!ori)
165 return -EINVAL;
166
167 nom = (4096 / ori) + 1;
168 do
169 hld = 4096 - (--nom * (ori - 1));
170 while (hld < 120);
171
172 *pnom = nom;
173 *phld = hld;
174
175 return 0;
176}
177
178static int img_spdif_in_do_clkgen_single(struct img_spdif_in *spdif,
179 unsigned int rate)
180{
181 unsigned int nom, hld;
182 unsigned long flags, clk_rate;
183 int ret = 0;
184 u32 reg;
185
186 ret = img_spdif_in_check_max_rate(spdif, rate, &clk_rate);
187 if (ret)
188 return ret;
189
190 ret = img_spdif_in_do_clkgen_calc(rate, &nom, &hld, clk_rate);
191 if (ret)
192 return ret;
193
194 reg = (nom << IMG_SPDIF_IN_CLKGEN_NOM_SHIFT) &
195 IMG_SPDIF_IN_CLKGEN_NOM_MASK;
196 reg |= (hld << IMG_SPDIF_IN_CLKGEN_HLD_SHIFT) &
197 IMG_SPDIF_IN_CLKGEN_HLD_MASK;
198
199 spin_lock_irqsave(&spdif->lock, flags);
200
201 if (spdif->active) {
202 spin_unlock_irqrestore(&spdif->lock, flags);
203 return -EBUSY;
204 }
205
206 img_spdif_in_writel(spdif, reg, IMG_SPDIF_IN_CLKGEN);
207
208 spdif->single_freq = rate;
209
210 spin_unlock_irqrestore(&spdif->lock, flags);
211
212 return 0;
213}
214
215static int img_spdif_in_do_clkgen_multi(struct img_spdif_in *spdif,
216 unsigned int multi_freqs[])
217{
218 unsigned int nom, hld, rate, max_rate = 0;
219 unsigned long flags, clk_rate;
220 int i, ret = 0;
221 u32 reg, trk_reg, temp_regs[IMG_SPDIF_IN_NUM_ACLKGEN];
222
223 for (i = 0; i < IMG_SPDIF_IN_NUM_ACLKGEN; i++)
224 if (multi_freqs[i] > max_rate)
225 max_rate = multi_freqs[i];
226
227 ret = img_spdif_in_check_max_rate(spdif, max_rate, &clk_rate);
228 if (ret)
229 return ret;
230
231 for (i = 0; i < IMG_SPDIF_IN_NUM_ACLKGEN; i++) {
232 rate = multi_freqs[i];
233
234 ret = img_spdif_in_do_clkgen_calc(rate, &nom, &hld, clk_rate);
235 if (ret)
236 return ret;
237
238 reg = (nom << IMG_SPDIF_IN_ACLKGEN_NOM_SHIFT) &
239 IMG_SPDIF_IN_ACLKGEN_NOM_MASK;
240 reg |= (hld << IMG_SPDIF_IN_ACLKGEN_HLD_SHIFT) &
241 IMG_SPDIF_IN_ACLKGEN_HLD_MASK;
242 temp_regs[i] = reg;
243 }
244
245 spin_lock_irqsave(&spdif->lock, flags);
246
247 if (spdif->active) {
248 spin_unlock_irqrestore(&spdif->lock, flags);
249 return -EBUSY;
250 }
251
252 trk_reg = spdif->trk << IMG_SPDIF_IN_ACLKGEN_TRK_SHIFT;
253
254 for (i = 0; i < IMG_SPDIF_IN_NUM_ACLKGEN; i++) {
255 spdif->aclkgen_regs[i] = temp_regs[i] | trk_reg;
256 img_spdif_in_aclkgen_writel(spdif, i);
257 }
258
259 spdif->multi_freq = true;
260 spdif->multi_freqs[0] = multi_freqs[0];
261 spdif->multi_freqs[1] = multi_freqs[1];
262 spdif->multi_freqs[2] = multi_freqs[2];
263 spdif->multi_freqs[3] = multi_freqs[3];
264
265 spin_unlock_irqrestore(&spdif->lock, flags);
266
267 return 0;
268}
269
270static int img_spdif_in_iec958_info(struct snd_kcontrol *kcontrol,
271 struct snd_ctl_elem_info *uinfo)
272{
273 uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
274 uinfo->count = 1;
275
276 return 0;
277}
278
279static int img_spdif_in_get_status_mask(struct snd_kcontrol *kcontrol,
280 struct snd_ctl_elem_value *ucontrol)
281{
282 ucontrol->value.iec958.status[0] = 0xff;
283 ucontrol->value.iec958.status[1] = 0xff;
284 ucontrol->value.iec958.status[2] = 0xff;
285 ucontrol->value.iec958.status[3] = 0xff;
286 ucontrol->value.iec958.status[4] = 0xff;
287
288 return 0;
289}
290
291static int img_spdif_in_get_status(struct snd_kcontrol *kcontrol,
292 struct snd_ctl_elem_value *ucontrol)
293{
294 struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
295 struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(cpu_dai);
296 u32 reg;
297
298 reg = img_spdif_in_readl(spdif, IMG_SPDIF_IN_CSL);
299 ucontrol->value.iec958.status[0] = reg & 0xff;
300 ucontrol->value.iec958.status[1] = (reg >> 8) & 0xff;
301 ucontrol->value.iec958.status[2] = (reg >> 16) & 0xff;
302 ucontrol->value.iec958.status[3] = (reg >> 24) & 0xff;
303 reg = img_spdif_in_readl(spdif, IMG_SPDIF_IN_CSH);
304 ucontrol->value.iec958.status[4] = (reg & IMG_SPDIF_IN_CSH_MASK)
305 >> IMG_SPDIF_IN_CSH_SHIFT;
306
307 return 0;
308}
309
310static int img_spdif_in_info_multi_freq(struct snd_kcontrol *kcontrol,
311 struct snd_ctl_elem_info *uinfo)
312{
313 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
314 uinfo->count = IMG_SPDIF_IN_NUM_ACLKGEN;
315 uinfo->value.integer.min = 0;
316 uinfo->value.integer.max = LONG_MAX;
317
318 return 0;
319}
320
321static int img_spdif_in_get_multi_freq(struct snd_kcontrol *kcontrol,
322 struct snd_ctl_elem_value *ucontrol)
323{
324 struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
325 struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(cpu_dai);
326 unsigned long flags;
327
328 spin_lock_irqsave(&spdif->lock, flags);
329 if (spdif->multi_freq) {
330 ucontrol->value.integer.value[0] = spdif->multi_freqs[0];
331 ucontrol->value.integer.value[1] = spdif->multi_freqs[1];
332 ucontrol->value.integer.value[2] = spdif->multi_freqs[2];
333 ucontrol->value.integer.value[3] = spdif->multi_freqs[3];
334 } else {
335 ucontrol->value.integer.value[0] = 0;
336 ucontrol->value.integer.value[1] = 0;
337 ucontrol->value.integer.value[2] = 0;
338 ucontrol->value.integer.value[3] = 0;
339 }
340 spin_unlock_irqrestore(&spdif->lock, flags);
341
342 return 0;
343}
344
345static int img_spdif_in_set_multi_freq(struct snd_kcontrol *kcontrol,
346 struct snd_ctl_elem_value *ucontrol)
347{
348 struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
349 struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(cpu_dai);
350 unsigned int multi_freqs[IMG_SPDIF_IN_NUM_ACLKGEN];
351 bool multi_freq;
352 unsigned long flags;
353
354 if ((ucontrol->value.integer.value[0] == 0) &&
355 (ucontrol->value.integer.value[1] == 0) &&
356 (ucontrol->value.integer.value[2] == 0) &&
357 (ucontrol->value.integer.value[3] == 0)) {
358 multi_freq = false;
359 } else {
360 multi_freqs[0] = ucontrol->value.integer.value[0];
361 multi_freqs[1] = ucontrol->value.integer.value[1];
362 multi_freqs[2] = ucontrol->value.integer.value[2];
363 multi_freqs[3] = ucontrol->value.integer.value[3];
364 multi_freq = true;
365 }
366
367 if (multi_freq)
368 return img_spdif_in_do_clkgen_multi(spdif, multi_freqs);
369
370 spin_lock_irqsave(&spdif->lock, flags);
371
372 if (spdif->active) {
373 spin_unlock_irqrestore(&spdif->lock, flags);
374 return -EBUSY;
375 }
376
377 spdif->multi_freq = false;
378
379 spin_unlock_irqrestore(&spdif->lock, flags);
380
381 return 0;
382}
383
384static int img_spdif_in_info_lock_freq(struct snd_kcontrol *kcontrol,
385 struct snd_ctl_elem_info *uinfo)
386{
387 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
388 uinfo->count = 1;
389 uinfo->value.integer.min = 0;
390 uinfo->value.integer.max = LONG_MAX;
391
392 return 0;
393}
394
395static int img_spdif_in_get_lock_freq(struct snd_kcontrol *kcontrol,
396 struct snd_ctl_elem_value *uc)
397{
398 struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
399 struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(cpu_dai);
400 u32 reg;
401 int i;
402 unsigned long flags;
403
404 spin_lock_irqsave(&spdif->lock, flags);
405
406 reg = img_spdif_in_readl(spdif, IMG_SPDIF_IN_STATUS);
407 if (reg & IMG_SPDIF_IN_STATUS_LOCK_MASK) {
408 if (spdif->multi_freq) {
409 i = ((reg & IMG_SPDIF_IN_STATUS_SAM_MASK) >>
410 IMG_SPDIF_IN_STATUS_SAM_SHIFT) - 1;
411 uc->value.integer.value[0] = spdif->multi_freqs[i];
412 } else {
413 uc->value.integer.value[0] = spdif->single_freq;
414 }
415 } else {
416 uc->value.integer.value[0] = 0;
417 }
418
419 spin_unlock_irqrestore(&spdif->lock, flags);
420
421 return 0;
422}
423
424static int img_spdif_in_info_trk(struct snd_kcontrol *kcontrol,
425 struct snd_ctl_elem_info *uinfo)
426{
427 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
428 uinfo->count = 1;
429 uinfo->value.integer.min = 0;
430 uinfo->value.integer.max = 255;
431
432 return 0;
433}
434
435static int img_spdif_in_get_trk(struct snd_kcontrol *kcontrol,
436 struct snd_ctl_elem_value *ucontrol)
437{
438 struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
439 struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(cpu_dai);
440
441 ucontrol->value.integer.value[0] = spdif->trk;
442
443 return 0;
444}
445
446static int img_spdif_in_set_trk(struct snd_kcontrol *kcontrol,
447 struct snd_ctl_elem_value *ucontrol)
448{
449 struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
450 struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(cpu_dai);
451 unsigned long flags;
452 int i;
453 u32 reg;
454
455 spin_lock_irqsave(&spdif->lock, flags);
456
457 if (spdif->active) {
458 spin_unlock_irqrestore(&spdif->lock, flags);
459 return -EBUSY;
460 }
461
462 spdif->trk = ucontrol->value.integer.value[0];
463
464 reg = img_spdif_in_readl(spdif, IMG_SPDIF_IN_CTL);
465 reg &= ~IMG_SPDIF_IN_CTL_TRK_MASK;
466 reg |= spdif->trk << IMG_SPDIF_IN_CTL_TRK_SHIFT;
467 img_spdif_in_writel(spdif, reg, IMG_SPDIF_IN_CTL);
468
469 for (i = 0; i < IMG_SPDIF_IN_NUM_ACLKGEN; i++) {
470 spdif->aclkgen_regs[i] = (spdif->aclkgen_regs[i] &
471 ~IMG_SPDIF_IN_ACLKGEN_TRK_MASK) |
472 (spdif->trk << IMG_SPDIF_IN_ACLKGEN_TRK_SHIFT);
473
474 img_spdif_in_aclkgen_writel(spdif, i);
475 }
476
477 spin_unlock_irqrestore(&spdif->lock, flags);
478
479 return 0;
480}
481
482static int img_spdif_in_info_lock(struct snd_kcontrol *kcontrol,
483 struct snd_ctl_elem_info *uinfo)
484{
485 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
486 uinfo->count = 1;
487 uinfo->value.integer.min = -128;
488 uinfo->value.integer.max = 127;
489
490 return 0;
491}
492
493static int img_spdif_in_get_lock_acquire(struct snd_kcontrol *kcontrol,
494 struct snd_ctl_elem_value *ucontrol)
495{
496 struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
497 struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(cpu_dai);
498
499 ucontrol->value.integer.value[0] = spdif->lock_acquire;
500
501 return 0;
502}
503
504static int img_spdif_in_set_lock_acquire(struct snd_kcontrol *kcontrol,
505 struct snd_ctl_elem_value *ucontrol)
506{
507 struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
508 struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(cpu_dai);
509 unsigned long flags;
510 u32 reg;
511
512 spin_lock_irqsave(&spdif->lock, flags);
513
514 if (spdif->active) {
515 spin_unlock_irqrestore(&spdif->lock, flags);
516 return -EBUSY;
517 }
518
519 spdif->lock_acquire = ucontrol->value.integer.value[0];
520
521 reg = img_spdif_in_readl(spdif, IMG_SPDIF_IN_CTL);
522 reg &= ~IMG_SPDIF_IN_CTL_LOCKHI_MASK;
523 reg |= (spdif->lock_acquire << IMG_SPDIF_IN_CTL_LOCKHI_SHIFT) &
524 IMG_SPDIF_IN_CTL_LOCKHI_MASK;
525 img_spdif_in_writel(spdif, reg, IMG_SPDIF_IN_CTL);
526
527 spin_unlock_irqrestore(&spdif->lock, flags);
528
529 return 0;
530}
531
532static int img_spdif_in_get_lock_release(struct snd_kcontrol *kcontrol,
533 struct snd_ctl_elem_value *ucontrol)
534{
535 struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
536 struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(cpu_dai);
537
538 ucontrol->value.integer.value[0] = spdif->lock_release;
539
540 return 0;
541}
542
543static int img_spdif_in_set_lock_release(struct snd_kcontrol *kcontrol,
544 struct snd_ctl_elem_value *ucontrol)
545{
546 struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
547 struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(cpu_dai);
548 unsigned long flags;
549 u32 reg;
550
551 spin_lock_irqsave(&spdif->lock, flags);
552
553 if (spdif->active) {
554 spin_unlock_irqrestore(&spdif->lock, flags);
555 return -EBUSY;
556 }
557
558 spdif->lock_release = ucontrol->value.integer.value[0];
559
560 reg = img_spdif_in_readl(spdif, IMG_SPDIF_IN_CTL);
561 reg &= ~IMG_SPDIF_IN_CTL_LOCKLO_MASK;
562 reg |= (spdif->lock_release << IMG_SPDIF_IN_CTL_LOCKLO_SHIFT) &
563 IMG_SPDIF_IN_CTL_LOCKLO_MASK;
564 img_spdif_in_writel(spdif, reg, IMG_SPDIF_IN_CTL);
565
566 spin_unlock_irqrestore(&spdif->lock, flags);
567
568 return 0;
569}
570
571static struct snd_kcontrol_new img_spdif_in_controls[] = {
572 {
573 .access = SNDRV_CTL_ELEM_ACCESS_READ,
574 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
575 .name = SNDRV_CTL_NAME_IEC958("", CAPTURE, MASK),
576 .info = img_spdif_in_iec958_info,
577 .get = img_spdif_in_get_status_mask
578 },
579 {
580 .access = SNDRV_CTL_ELEM_ACCESS_READ |
581 SNDRV_CTL_ELEM_ACCESS_VOLATILE,
582 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
583 .name = SNDRV_CTL_NAME_IEC958("", CAPTURE, DEFAULT),
584 .info = img_spdif_in_iec958_info,
585 .get = img_spdif_in_get_status
586 },
587 {
588 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
589 .name = "SPDIF In Multi Frequency Acquire",
590 .info = img_spdif_in_info_multi_freq,
591 .get = img_spdif_in_get_multi_freq,
592 .put = img_spdif_in_set_multi_freq
593 },
594 {
595 .access = SNDRV_CTL_ELEM_ACCESS_READ |
596 SNDRV_CTL_ELEM_ACCESS_VOLATILE,
597 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
598 .name = "SPDIF In Lock Frequency",
599 .info = img_spdif_in_info_lock_freq,
600 .get = img_spdif_in_get_lock_freq
601 },
602 {
603 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
604 .name = "SPDIF In Lock TRK",
605 .info = img_spdif_in_info_trk,
606 .get = img_spdif_in_get_trk,
607 .put = img_spdif_in_set_trk
608 },
609 {
610 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
611 .name = "SPDIF In Lock Acquire Threshold",
612 .info = img_spdif_in_info_lock,
613 .get = img_spdif_in_get_lock_acquire,
614 .put = img_spdif_in_set_lock_acquire
615 },
616 {
617 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
618 .name = "SPDIF In Lock Release Threshold",
619 .info = img_spdif_in_info_lock,
620 .get = img_spdif_in_get_lock_release,
621 .put = img_spdif_in_set_lock_release
622 }
623};
624
625static int img_spdif_in_trigger(struct snd_pcm_substream *substream, int cmd,
626 struct snd_soc_dai *dai)
627{
628 unsigned long flags;
629 struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(dai);
630 int ret = 0;
631 u32 reg;
632
633 spin_lock_irqsave(&spdif->lock, flags);
634
635 switch (cmd) {
636 case SNDRV_PCM_TRIGGER_START:
637 case SNDRV_PCM_TRIGGER_RESUME:
638 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
639 reg = img_spdif_in_readl(spdif, IMG_SPDIF_IN_CTL);
640 if (spdif->multi_freq)
641 reg &= ~IMG_SPDIF_IN_CTL_SRD_MASK;
642 else
643 reg |= (1UL << IMG_SPDIF_IN_CTL_SRD_SHIFT);
644 reg |= IMG_SPDIF_IN_CTL_SRT_MASK;
645 img_spdif_in_writel(spdif, reg, IMG_SPDIF_IN_CTL);
646 spdif->active = true;
647 break;
648 case SNDRV_PCM_TRIGGER_STOP:
649 case SNDRV_PCM_TRIGGER_SUSPEND:
650 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
651 reg = img_spdif_in_readl(spdif, IMG_SPDIF_IN_CTL);
652 reg &= ~IMG_SPDIF_IN_CTL_SRT_MASK;
653 img_spdif_in_writel(spdif, reg, IMG_SPDIF_IN_CTL);
654 spdif->active = false;
655 break;
656 default:
657 ret = -EINVAL;
658 }
659
660 spin_unlock_irqrestore(&spdif->lock, flags);
661
662 return ret;
663}
664
665static int img_spdif_in_hw_params(struct snd_pcm_substream *substream,
666 struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
667{
668 struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(dai);
669 unsigned int rate, channels;
670 snd_pcm_format_t format;
671
672 rate = params_rate(params);
673 channels = params_channels(params);
674 format = params_format(params);
675
676 if (format != SNDRV_PCM_FORMAT_S32_LE)
677 return -EINVAL;
678
679 if (channels != 2)
680 return -EINVAL;
681
682 return img_spdif_in_do_clkgen_single(spdif, rate);
683}
684
685static const struct snd_soc_dai_ops img_spdif_in_dai_ops = {
686 .trigger = img_spdif_in_trigger,
687 .hw_params = img_spdif_in_hw_params
688};
689
690static int img_spdif_in_dai_probe(struct snd_soc_dai *dai)
691{
692 struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(dai);
693
694 snd_soc_dai_init_dma_data(dai, NULL, &spdif->dma_data);
695
696 snd_soc_add_dai_controls(dai, img_spdif_in_controls,
697 ARRAY_SIZE(img_spdif_in_controls));
698
699 return 0;
700}
701
702static struct snd_soc_dai_driver img_spdif_in_dai = {
703 .probe = img_spdif_in_dai_probe,
704 .capture = {
705 .channels_min = 2,
706 .channels_max = 2,
707 .rates = SNDRV_PCM_RATE_8000_192000,
708 .formats = SNDRV_PCM_FMTBIT_S32_LE
709 },
710 .ops = &img_spdif_in_dai_ops
711};
712
713static const struct snd_soc_component_driver img_spdif_in_component = {
714 .name = "img-spdif-in"
715};
716
717static int img_spdif_in_probe(struct platform_device *pdev)
718{
719 struct img_spdif_in *spdif;
720 struct resource *res;
721 void __iomem *base;
722 int ret;
723 struct reset_control *rst;
724 u32 reg;
725 struct device *dev = &pdev->dev;
726
727 spdif = devm_kzalloc(&pdev->dev, sizeof(*spdif), GFP_KERNEL);
728 if (!spdif)
729 return -ENOMEM;
730
731 platform_set_drvdata(pdev, spdif);
732
733 spdif->dev = &pdev->dev;
734
735 base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
736 if (IS_ERR(base))
737 return PTR_ERR(base);
738
739 spdif->base = base;
740
741 spdif->clk_sys = devm_clk_get(dev, "sys");
742 if (IS_ERR(spdif->clk_sys)) {
743 if (PTR_ERR(spdif->clk_sys) != -EPROBE_DEFER)
744 dev_err(dev, "Failed to acquire clock 'sys'\n");
745 return PTR_ERR(spdif->clk_sys);
746 }
747
748 pm_runtime_enable(&pdev->dev);
749 if (!pm_runtime_enabled(&pdev->dev)) {
750 ret = img_spdif_in_runtime_resume(&pdev->dev);
751 if (ret)
752 goto err_pm_disable;
753 }
754 ret = pm_runtime_get_sync(&pdev->dev);
755 if (ret < 0) {
756 pm_runtime_put_noidle(&pdev->dev);
757 goto err_suspend;
758 }
759
760 rst = devm_reset_control_get_exclusive(&pdev->dev, "rst");
761 if (IS_ERR(rst)) {
762 if (PTR_ERR(rst) == -EPROBE_DEFER) {
763 ret = -EPROBE_DEFER;
764 goto err_pm_put;
765 }
766 dev_dbg(dev, "No top level reset found\n");
767 img_spdif_in_writel(spdif, IMG_SPDIF_IN_SOFT_RESET_MASK,
768 IMG_SPDIF_IN_SOFT_RESET);
769 img_spdif_in_writel(spdif, 0, IMG_SPDIF_IN_SOFT_RESET);
770 } else {
771 reset_control_assert(rst);
772 reset_control_deassert(rst);
773 }
774
775 spin_lock_init(&spdif->lock);
776
777 spdif->dma_data.addr = res->start + IMG_SPDIF_IN_RX_FIFO_OFFSET;
778 spdif->dma_data.addr_width = 4;
779 spdif->dma_data.maxburst = 4;
780 spdif->trk = 0x80;
781 spdif->lock_acquire = 4;
782 spdif->lock_release = -128;
783
784 reg = (spdif->lock_acquire << IMG_SPDIF_IN_CTL_LOCKHI_SHIFT) &
785 IMG_SPDIF_IN_CTL_LOCKHI_MASK;
786 reg |= (spdif->lock_release << IMG_SPDIF_IN_CTL_LOCKLO_SHIFT) &
787 IMG_SPDIF_IN_CTL_LOCKLO_MASK;
788 reg |= (spdif->trk << IMG_SPDIF_IN_CTL_TRK_SHIFT) &
789 IMG_SPDIF_IN_CTL_TRK_MASK;
790 img_spdif_in_writel(spdif, reg, IMG_SPDIF_IN_CTL);
791
792 pm_runtime_put(&pdev->dev);
793
794 ret = devm_snd_soc_register_component(&pdev->dev,
795 &img_spdif_in_component, &img_spdif_in_dai, 1);
796 if (ret)
797 goto err_suspend;
798
799 ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
800 if (ret)
801 goto err_suspend;
802
803 return 0;
804
805err_pm_put:
806 pm_runtime_put(&pdev->dev);
807err_suspend:
808 if (!pm_runtime_enabled(&pdev->dev))
809 img_spdif_in_runtime_suspend(&pdev->dev);
810err_pm_disable:
811 pm_runtime_disable(&pdev->dev);
812
813 return ret;
814}
815
816static int img_spdif_in_dev_remove(struct platform_device *pdev)
817{
818 pm_runtime_disable(&pdev->dev);
819 if (!pm_runtime_status_suspended(&pdev->dev))
820 img_spdif_in_runtime_suspend(&pdev->dev);
821
822 return 0;
823}
824
825#ifdef CONFIG_PM_SLEEP
826static int img_spdif_in_suspend(struct device *dev)
827{
828 struct img_spdif_in *spdif = dev_get_drvdata(dev);
829 int ret;
830
831 if (pm_runtime_status_suspended(dev)) {
832 ret = img_spdif_in_runtime_resume(dev);
833 if (ret)
834 return ret;
835 }
836
837 spdif->suspend_clkgen = img_spdif_in_readl(spdif, IMG_SPDIF_IN_CLKGEN);
838 spdif->suspend_ctl = img_spdif_in_readl(spdif, IMG_SPDIF_IN_CTL);
839
840 img_spdif_in_runtime_suspend(dev);
841
842 return 0;
843}
844
845static int img_spdif_in_resume(struct device *dev)
846{
847 struct img_spdif_in *spdif = dev_get_drvdata(dev);
848 int i, ret;
849
850 ret = img_spdif_in_runtime_resume(dev);
851 if (ret)
852 return ret;
853
854 for (i = 0; i < IMG_SPDIF_IN_NUM_ACLKGEN; i++)
855 img_spdif_in_aclkgen_writel(spdif, i);
856
857 img_spdif_in_writel(spdif, spdif->suspend_clkgen, IMG_SPDIF_IN_CLKGEN);
858 img_spdif_in_writel(spdif, spdif->suspend_ctl, IMG_SPDIF_IN_CTL);
859
860 if (pm_runtime_status_suspended(dev))
861 img_spdif_in_runtime_suspend(dev);
862
863 return 0;
864}
865#endif
866
867static const struct of_device_id img_spdif_in_of_match[] = {
868 { .compatible = "img,spdif-in" },
869 {}
870};
871MODULE_DEVICE_TABLE(of, img_spdif_in_of_match);
872
873static const struct dev_pm_ops img_spdif_in_pm_ops = {
874 SET_RUNTIME_PM_OPS(img_spdif_in_runtime_suspend,
875 img_spdif_in_runtime_resume, NULL)
876 SET_SYSTEM_SLEEP_PM_OPS(img_spdif_in_suspend, img_spdif_in_resume)
877};
878
879static struct platform_driver img_spdif_in_driver = {
880 .driver = {
881 .name = "img-spdif-in",
882 .of_match_table = img_spdif_in_of_match,
883 .pm = &img_spdif_in_pm_ops
884 },
885 .probe = img_spdif_in_probe,
886 .remove = img_spdif_in_dev_remove
887};
888module_platform_driver(img_spdif_in_driver);
889
890MODULE_AUTHOR("Damien Horsley <Damien.Horsley@imgtec.com>");
891MODULE_DESCRIPTION("IMG SPDIF Input driver");
892MODULE_LICENSE("GPL v2");
893
