2 * IMG SPDIF input controller driver
4 * Copyright (C) 2015 Imagination Technologies Ltd.
6 * Author: Damien Horsley <Damien.Horsley@imgtec.com>
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms and conditions of the GNU General Public License,
10 * version 2, as published by the Free Software Foundation.
13 #include <linux/clk.h>
14 #include <linux/init.h>
15 #include <linux/kernel.h>
16 #include <linux/module.h>
18 #include <linux/platform_device.h>
19 #include <linux/reset.h>
21 #include <sound/core.h>
22 #include <sound/dmaengine_pcm.h>
23 #include <sound/initval.h>
24 #include <sound/pcm.h>
25 #include <sound/pcm_params.h>
26 #include <sound/soc.h>
28 #define IMG_SPDIF_IN_RX_FIFO_OFFSET 0
30 #define IMG_SPDIF_IN_CTL 0x4
31 #define IMG_SPDIF_IN_CTL_LOCKLO_MASK 0xff
32 #define IMG_SPDIF_IN_CTL_LOCKLO_SHIFT 0
33 #define IMG_SPDIF_IN_CTL_LOCKHI_MASK 0xff00
34 #define IMG_SPDIF_IN_CTL_LOCKHI_SHIFT 8
35 #define IMG_SPDIF_IN_CTL_TRK_MASK 0xff0000
36 #define IMG_SPDIF_IN_CTL_TRK_SHIFT 16
37 #define IMG_SPDIF_IN_CTL_SRD_MASK 0x70000000
38 #define IMG_SPDIF_IN_CTL_SRD_SHIFT 28
39 #define IMG_SPDIF_IN_CTL_SRT_MASK BIT(31)
41 #define IMG_SPDIF_IN_STATUS 0x8
42 #define IMG_SPDIF_IN_STATUS_SAM_MASK 0x7000
43 #define IMG_SPDIF_IN_STATUS_SAM_SHIFT 12
44 #define IMG_SPDIF_IN_STATUS_LOCK_MASK BIT(15)
45 #define IMG_SPDIF_IN_STATUS_LOCK_SHIFT 15
47 #define IMG_SPDIF_IN_CLKGEN 0x1c
48 #define IMG_SPDIF_IN_CLKGEN_NOM_MASK 0x3ff
49 #define IMG_SPDIF_IN_CLKGEN_NOM_SHIFT 0
50 #define IMG_SPDIF_IN_CLKGEN_HLD_MASK 0x3ff0000
51 #define IMG_SPDIF_IN_CLKGEN_HLD_SHIFT 16
53 #define IMG_SPDIF_IN_CSL 0x20
55 #define IMG_SPDIF_IN_CSH 0x24
56 #define IMG_SPDIF_IN_CSH_MASK 0xff
57 #define IMG_SPDIF_IN_CSH_SHIFT 0
59 #define IMG_SPDIF_IN_SOFT_RESET 0x28
60 #define IMG_SPDIF_IN_SOFT_RESET_MASK BIT(0)
62 #define IMG_SPDIF_IN_ACLKGEN_START 0x2c
63 #define IMG_SPDIF_IN_ACLKGEN_NOM_MASK 0x3ff
64 #define IMG_SPDIF_IN_ACLKGEN_NOM_SHIFT 0
65 #define IMG_SPDIF_IN_ACLKGEN_HLD_MASK 0xffc00
66 #define IMG_SPDIF_IN_ACLKGEN_HLD_SHIFT 10
67 #define IMG_SPDIF_IN_ACLKGEN_TRK_MASK 0xff00000
68 #define IMG_SPDIF_IN_ACLKGEN_TRK_SHIFT 20
70 #define IMG_SPDIF_IN_NUM_ACLKGEN 4
76 struct snd_dmaengine_dai_dma_data dma_data;
82 unsigned int single_freq;
83 unsigned int multi_freqs[IMG_SPDIF_IN_NUM_ACLKGEN];
86 /* Write-only registers */
87 unsigned int aclkgen_regs[IMG_SPDIF_IN_NUM_ACLKGEN];
90 static inline void img_spdif_in_writel(struct img_spdif_in *spdif,
93 writel(val, spdif->base + reg);
96 static inline u32 img_spdif_in_readl(struct img_spdif_in *spdif, u32 reg)
98 return readl(spdif->base + reg);
101 static inline void img_spdif_in_aclkgen_writel(struct img_spdif_in *spdif,
104 img_spdif_in_writel(spdif, spdif->aclkgen_regs[index],
105 IMG_SPDIF_IN_ACLKGEN_START + (index * 0x4));
108 static int img_spdif_in_check_max_rate(struct img_spdif_in *spdif,
109 unsigned int sample_rate, unsigned long *actual_freq)
111 unsigned long min_freq, freq_t;
113 /* Clock rate must be at least 24x the bit rate */
114 min_freq = sample_rate * 2 * 32 * 24;
116 freq_t = clk_get_rate(spdif->clk_sys);
118 if (freq_t < min_freq)
121 *actual_freq = freq_t;
126 static int img_spdif_in_do_clkgen_calc(unsigned int rate, unsigned int *pnom,
127 unsigned int *phld, unsigned long clk_rate)
129 unsigned int ori, nom, hld;
132 * Calculate oversampling ratio, nominal phase increment and hold
133 * increment for the given rate / frequency
139 ori = clk_rate / (rate * 64);
144 nom = (4096 / ori) + 1;
146 hld = 4096 - (--nom * (ori - 1));
155 static int img_spdif_in_do_clkgen_single(struct img_spdif_in *spdif,
158 unsigned int nom, hld;
159 unsigned long flags, clk_rate;
163 ret = img_spdif_in_check_max_rate(spdif, rate, &clk_rate);
167 ret = img_spdif_in_do_clkgen_calc(rate, &nom, &hld, clk_rate);
171 reg = (nom << IMG_SPDIF_IN_CLKGEN_NOM_SHIFT) &
172 IMG_SPDIF_IN_CLKGEN_NOM_MASK;
173 reg |= (hld << IMG_SPDIF_IN_CLKGEN_HLD_SHIFT) &
174 IMG_SPDIF_IN_CLKGEN_HLD_MASK;
176 spin_lock_irqsave(&spdif->lock, flags);
179 spin_unlock_irqrestore(&spdif->lock, flags);
183 img_spdif_in_writel(spdif, reg, IMG_SPDIF_IN_CLKGEN);
185 spdif->single_freq = rate;
187 spin_unlock_irqrestore(&spdif->lock, flags);
192 static int img_spdif_in_do_clkgen_multi(struct img_spdif_in *spdif,
193 unsigned int multi_freqs[])
195 unsigned int nom, hld, rate, max_rate = 0;
196 unsigned long flags, clk_rate;
198 u32 reg, trk_reg, temp_regs[IMG_SPDIF_IN_NUM_ACLKGEN];
200 for (i = 0; i < IMG_SPDIF_IN_NUM_ACLKGEN; i++)
201 if (multi_freqs[i] > max_rate)
202 max_rate = multi_freqs[i];
204 ret = img_spdif_in_check_max_rate(spdif, max_rate, &clk_rate);
208 for (i = 0; i < IMG_SPDIF_IN_NUM_ACLKGEN; i++) {
209 rate = multi_freqs[i];
211 ret = img_spdif_in_do_clkgen_calc(rate, &nom, &hld, clk_rate);
215 reg = (nom << IMG_SPDIF_IN_ACLKGEN_NOM_SHIFT) &
216 IMG_SPDIF_IN_ACLKGEN_NOM_MASK;
217 reg |= (hld << IMG_SPDIF_IN_ACLKGEN_HLD_SHIFT) &
218 IMG_SPDIF_IN_ACLKGEN_HLD_MASK;
222 spin_lock_irqsave(&spdif->lock, flags);
225 spin_unlock_irqrestore(&spdif->lock, flags);
229 trk_reg = spdif->trk << IMG_SPDIF_IN_ACLKGEN_TRK_SHIFT;
231 for (i = 0; i < IMG_SPDIF_IN_NUM_ACLKGEN; i++) {
232 spdif->aclkgen_regs[i] = temp_regs[i] | trk_reg;
233 img_spdif_in_aclkgen_writel(spdif, i);
236 spdif->multi_freq = true;
237 spdif->multi_freqs[0] = multi_freqs[0];
238 spdif->multi_freqs[1] = multi_freqs[1];
239 spdif->multi_freqs[2] = multi_freqs[2];
240 spdif->multi_freqs[3] = multi_freqs[3];
242 spin_unlock_irqrestore(&spdif->lock, flags);
247 static int img_spdif_in_iec958_info(struct snd_kcontrol *kcontrol,
248 struct snd_ctl_elem_info *uinfo)
250 uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
256 static int img_spdif_in_get_status_mask(struct snd_kcontrol *kcontrol,
257 struct snd_ctl_elem_value *ucontrol)
259 ucontrol->value.iec958.status[0] = 0xff;
260 ucontrol->value.iec958.status[1] = 0xff;
261 ucontrol->value.iec958.status[2] = 0xff;
262 ucontrol->value.iec958.status[3] = 0xff;
263 ucontrol->value.iec958.status[4] = 0xff;
268 static int img_spdif_in_get_status(struct snd_kcontrol *kcontrol,
269 struct snd_ctl_elem_value *ucontrol)
271 struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
272 struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(cpu_dai);
275 reg = img_spdif_in_readl(spdif, IMG_SPDIF_IN_CSL);
276 ucontrol->value.iec958.status[0] = reg & 0xff;
277 ucontrol->value.iec958.status[1] = (reg >> 8) & 0xff;
278 ucontrol->value.iec958.status[2] = (reg >> 16) & 0xff;
279 ucontrol->value.iec958.status[3] = (reg >> 24) & 0xff;
280 reg = img_spdif_in_readl(spdif, IMG_SPDIF_IN_CSH);
281 ucontrol->value.iec958.status[4] = (reg & IMG_SPDIF_IN_CSH_MASK)
282 >> IMG_SPDIF_IN_CSH_SHIFT;
287 static int img_spdif_in_info_multi_freq(struct snd_kcontrol *kcontrol,
288 struct snd_ctl_elem_info *uinfo)
290 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
291 uinfo->count = IMG_SPDIF_IN_NUM_ACLKGEN;
292 uinfo->value.integer.min = 0;
293 uinfo->value.integer.max = LONG_MAX;
298 static int img_spdif_in_get_multi_freq(struct snd_kcontrol *kcontrol,
299 struct snd_ctl_elem_value *ucontrol)
301 struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
302 struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(cpu_dai);
305 spin_lock_irqsave(&spdif->lock, flags);
306 if (spdif->multi_freq) {
307 ucontrol->value.integer.value[0] = spdif->multi_freqs[0];
308 ucontrol->value.integer.value[1] = spdif->multi_freqs[1];
309 ucontrol->value.integer.value[2] = spdif->multi_freqs[2];
310 ucontrol->value.integer.value[3] = spdif->multi_freqs[3];
312 ucontrol->value.integer.value[0] = 0;
313 ucontrol->value.integer.value[1] = 0;
314 ucontrol->value.integer.value[2] = 0;
315 ucontrol->value.integer.value[3] = 0;
317 spin_unlock_irqrestore(&spdif->lock, flags);
322 static int img_spdif_in_set_multi_freq(struct snd_kcontrol *kcontrol,
323 struct snd_ctl_elem_value *ucontrol)
325 struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
326 struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(cpu_dai);
327 unsigned int multi_freqs[IMG_SPDIF_IN_NUM_ACLKGEN];
331 if ((ucontrol->value.integer.value[0] == 0) &&
332 (ucontrol->value.integer.value[1] == 0) &&
333 (ucontrol->value.integer.value[2] == 0) &&
334 (ucontrol->value.integer.value[3] == 0)) {
337 multi_freqs[0] = ucontrol->value.integer.value[0];
338 multi_freqs[1] = ucontrol->value.integer.value[1];
339 multi_freqs[2] = ucontrol->value.integer.value[2];
340 multi_freqs[3] = ucontrol->value.integer.value[3];
345 return img_spdif_in_do_clkgen_multi(spdif, multi_freqs);
347 spin_lock_irqsave(&spdif->lock, flags);
350 spin_unlock_irqrestore(&spdif->lock, flags);
354 spdif->multi_freq = false;
356 spin_unlock_irqrestore(&spdif->lock, flags);
361 static int img_spdif_in_info_lock_freq(struct snd_kcontrol *kcontrol,
362 struct snd_ctl_elem_info *uinfo)
364 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
366 uinfo->value.integer.min = 0;
367 uinfo->value.integer.max = LONG_MAX;
372 static int img_spdif_in_get_lock_freq(struct snd_kcontrol *kcontrol,
373 struct snd_ctl_elem_value *uc)
375 struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
376 struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(cpu_dai);
381 spin_lock_irqsave(&spdif->lock, flags);
383 reg = img_spdif_in_readl(spdif, IMG_SPDIF_IN_STATUS);
384 if (reg & IMG_SPDIF_IN_STATUS_LOCK_MASK) {
385 if (spdif->multi_freq) {
386 i = ((reg & IMG_SPDIF_IN_STATUS_SAM_MASK) >>
387 IMG_SPDIF_IN_STATUS_SAM_SHIFT) - 1;
388 uc->value.integer.value[0] = spdif->multi_freqs[i];
390 uc->value.integer.value[0] = spdif->single_freq;
393 uc->value.integer.value[0] = 0;
396 spin_unlock_irqrestore(&spdif->lock, flags);
401 static int img_spdif_in_info_trk(struct snd_kcontrol *kcontrol,
402 struct snd_ctl_elem_info *uinfo)
404 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
406 uinfo->value.integer.min = 0;
407 uinfo->value.integer.max = 255;
412 static int img_spdif_in_get_trk(struct snd_kcontrol *kcontrol,
413 struct snd_ctl_elem_value *ucontrol)
415 struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
416 struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(cpu_dai);
418 ucontrol->value.integer.value[0] = spdif->trk;
423 static int img_spdif_in_set_trk(struct snd_kcontrol *kcontrol,
424 struct snd_ctl_elem_value *ucontrol)
426 struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
427 struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(cpu_dai);
432 spin_lock_irqsave(&spdif->lock, flags);
435 spin_unlock_irqrestore(&spdif->lock, flags);
439 spdif->trk = ucontrol->value.integer.value[0];
441 reg = img_spdif_in_readl(spdif, IMG_SPDIF_IN_CTL);
442 reg &= ~IMG_SPDIF_IN_CTL_TRK_MASK;
443 reg |= spdif->trk << IMG_SPDIF_IN_CTL_TRK_SHIFT;
444 img_spdif_in_writel(spdif, reg, IMG_SPDIF_IN_CTL);
446 for (i = 0; i < IMG_SPDIF_IN_NUM_ACLKGEN; i++) {
447 spdif->aclkgen_regs[i] = (spdif->aclkgen_regs[i] &
448 ~IMG_SPDIF_IN_ACLKGEN_TRK_MASK) |
449 (spdif->trk << IMG_SPDIF_IN_ACLKGEN_TRK_SHIFT);
451 img_spdif_in_aclkgen_writel(spdif, i);
454 spin_unlock_irqrestore(&spdif->lock, flags);
459 static int img_spdif_in_info_lock(struct snd_kcontrol *kcontrol,
460 struct snd_ctl_elem_info *uinfo)
462 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
464 uinfo->value.integer.min = -128;
465 uinfo->value.integer.max = 127;
470 static int img_spdif_in_get_lock_acquire(struct snd_kcontrol *kcontrol,
471 struct snd_ctl_elem_value *ucontrol)
473 struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
474 struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(cpu_dai);
476 ucontrol->value.integer.value[0] = spdif->lock_acquire;
481 static int img_spdif_in_set_lock_acquire(struct snd_kcontrol *kcontrol,
482 struct snd_ctl_elem_value *ucontrol)
484 struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
485 struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(cpu_dai);
489 spin_lock_irqsave(&spdif->lock, flags);
492 spin_unlock_irqrestore(&spdif->lock, flags);
496 spdif->lock_acquire = ucontrol->value.integer.value[0];
498 reg = img_spdif_in_readl(spdif, IMG_SPDIF_IN_CTL);
499 reg &= ~IMG_SPDIF_IN_CTL_LOCKHI_MASK;
500 reg |= (spdif->lock_acquire << IMG_SPDIF_IN_CTL_LOCKHI_SHIFT) &
501 IMG_SPDIF_IN_CTL_LOCKHI_MASK;
502 img_spdif_in_writel(spdif, reg, IMG_SPDIF_IN_CTL);
504 spin_unlock_irqrestore(&spdif->lock, flags);
509 static int img_spdif_in_get_lock_release(struct snd_kcontrol *kcontrol,
510 struct snd_ctl_elem_value *ucontrol)
512 struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
513 struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(cpu_dai);
515 ucontrol->value.integer.value[0] = spdif->lock_release;
520 static int img_spdif_in_set_lock_release(struct snd_kcontrol *kcontrol,
521 struct snd_ctl_elem_value *ucontrol)
523 struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
524 struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(cpu_dai);
528 spin_lock_irqsave(&spdif->lock, flags);
531 spin_unlock_irqrestore(&spdif->lock, flags);
535 spdif->lock_release = ucontrol->value.integer.value[0];
537 reg = img_spdif_in_readl(spdif, IMG_SPDIF_IN_CTL);
538 reg &= ~IMG_SPDIF_IN_CTL_LOCKLO_MASK;
539 reg |= (spdif->lock_release << IMG_SPDIF_IN_CTL_LOCKLO_SHIFT) &
540 IMG_SPDIF_IN_CTL_LOCKLO_MASK;
541 img_spdif_in_writel(spdif, reg, IMG_SPDIF_IN_CTL);
543 spin_unlock_irqrestore(&spdif->lock, flags);
548 static struct snd_kcontrol_new img_spdif_in_controls[] = {
550 .access = SNDRV_CTL_ELEM_ACCESS_READ,
551 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
552 .name = SNDRV_CTL_NAME_IEC958("", CAPTURE, MASK),
553 .info = img_spdif_in_iec958_info,
554 .get = img_spdif_in_get_status_mask
557 .access = SNDRV_CTL_ELEM_ACCESS_READ |
558 SNDRV_CTL_ELEM_ACCESS_VOLATILE,
559 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
560 .name = SNDRV_CTL_NAME_IEC958("", CAPTURE, DEFAULT),
561 .info = img_spdif_in_iec958_info,
562 .get = img_spdif_in_get_status
565 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
566 .name = "SPDIF In Multi Frequency Acquire",
567 .info = img_spdif_in_info_multi_freq,
568 .get = img_spdif_in_get_multi_freq,
569 .put = img_spdif_in_set_multi_freq
572 .access = SNDRV_CTL_ELEM_ACCESS_READ |
573 SNDRV_CTL_ELEM_ACCESS_VOLATILE,
574 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
575 .name = "SPDIF In Lock Frequency",
576 .info = img_spdif_in_info_lock_freq,
577 .get = img_spdif_in_get_lock_freq
580 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
581 .name = "SPDIF In Lock TRK",
582 .info = img_spdif_in_info_trk,
583 .get = img_spdif_in_get_trk,
584 .put = img_spdif_in_set_trk
587 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
588 .name = "SPDIF In Lock Acquire Threshold",
589 .info = img_spdif_in_info_lock,
590 .get = img_spdif_in_get_lock_acquire,
591 .put = img_spdif_in_set_lock_acquire
594 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
595 .name = "SPDIF In Lock Release Threshold",
596 .info = img_spdif_in_info_lock,
597 .get = img_spdif_in_get_lock_release,
598 .put = img_spdif_in_set_lock_release
602 static int img_spdif_in_trigger(struct snd_pcm_substream *substream, int cmd,
603 struct snd_soc_dai *dai)
606 struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(dai);
610 spin_lock_irqsave(&spdif->lock, flags);
613 case SNDRV_PCM_TRIGGER_START:
614 case SNDRV_PCM_TRIGGER_RESUME:
615 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
616 reg = img_spdif_in_readl(spdif, IMG_SPDIF_IN_CTL);
617 if (spdif->multi_freq)
618 reg &= ~IMG_SPDIF_IN_CTL_SRD_MASK;
620 reg |= (1UL << IMG_SPDIF_IN_CTL_SRD_SHIFT);
621 reg |= IMG_SPDIF_IN_CTL_SRT_MASK;
622 img_spdif_in_writel(spdif, reg, IMG_SPDIF_IN_CTL);
623 spdif->active = true;
625 case SNDRV_PCM_TRIGGER_STOP:
626 case SNDRV_PCM_TRIGGER_SUSPEND:
627 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
628 reg = img_spdif_in_readl(spdif, IMG_SPDIF_IN_CTL);
629 reg &= ~IMG_SPDIF_IN_CTL_SRT_MASK;
630 img_spdif_in_writel(spdif, reg, IMG_SPDIF_IN_CTL);
631 spdif->active = false;
637 spin_unlock_irqrestore(&spdif->lock, flags);
642 static int img_spdif_in_hw_params(struct snd_pcm_substream *substream,
643 struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
645 struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(dai);
646 unsigned int rate, channels;
647 snd_pcm_format_t format;
649 rate = params_rate(params);
650 channels = params_channels(params);
651 format = params_format(params);
653 if (format != SNDRV_PCM_FORMAT_S32_LE)
659 return img_spdif_in_do_clkgen_single(spdif, rate);
662 static const struct snd_soc_dai_ops img_spdif_in_dai_ops = {
663 .trigger = img_spdif_in_trigger,
664 .hw_params = img_spdif_in_hw_params
667 static int img_spdif_in_dai_probe(struct snd_soc_dai *dai)
669 struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(dai);
671 snd_soc_dai_init_dma_data(dai, NULL, &spdif->dma_data);
673 snd_soc_add_dai_controls(dai, img_spdif_in_controls,
674 ARRAY_SIZE(img_spdif_in_controls));
679 static struct snd_soc_dai_driver img_spdif_in_dai = {
680 .probe = img_spdif_in_dai_probe,
684 .rates = SNDRV_PCM_RATE_8000_192000,
685 .formats = SNDRV_PCM_FMTBIT_S32_LE
687 .ops = &img_spdif_in_dai_ops
690 static const struct snd_soc_component_driver img_spdif_in_component = {
691 .name = "img-spdif-in"
694 static int img_spdif_in_probe(struct platform_device *pdev)
696 struct img_spdif_in *spdif;
697 struct resource *res;
700 struct reset_control *rst;
702 struct device *dev = &pdev->dev;
704 spdif = devm_kzalloc(&pdev->dev, sizeof(*spdif), GFP_KERNEL);
708 platform_set_drvdata(pdev, spdif);
710 spdif->dev = &pdev->dev;
712 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
713 base = devm_ioremap_resource(&pdev->dev, res);
715 return PTR_ERR(base);
719 spdif->clk_sys = devm_clk_get(dev, "sys");
720 if (IS_ERR(spdif->clk_sys)) {
721 if (PTR_ERR(spdif->clk_sys) != -EPROBE_DEFER)
722 dev_err(dev, "Failed to acquire clock 'sys'\n");
723 return PTR_ERR(spdif->clk_sys);
726 ret = clk_prepare_enable(spdif->clk_sys);
730 rst = devm_reset_control_get(&pdev->dev, "rst");
732 if (PTR_ERR(rst) == -EPROBE_DEFER) {
734 goto err_clk_disable;
736 dev_dbg(dev, "No top level reset found\n");
737 img_spdif_in_writel(spdif, IMG_SPDIF_IN_SOFT_RESET_MASK,
738 IMG_SPDIF_IN_SOFT_RESET);
739 img_spdif_in_writel(spdif, 0, IMG_SPDIF_IN_SOFT_RESET);
741 reset_control_assert(rst);
742 reset_control_deassert(rst);
745 spin_lock_init(&spdif->lock);
747 spdif->dma_data.addr = res->start + IMG_SPDIF_IN_RX_FIFO_OFFSET;
748 spdif->dma_data.addr_width = 4;
749 spdif->dma_data.maxburst = 4;
751 spdif->lock_acquire = 4;
752 spdif->lock_release = -128;
754 reg = (spdif->lock_acquire << IMG_SPDIF_IN_CTL_LOCKHI_SHIFT) &
755 IMG_SPDIF_IN_CTL_LOCKHI_MASK;
756 reg |= (spdif->lock_release << IMG_SPDIF_IN_CTL_LOCKLO_SHIFT) &
757 IMG_SPDIF_IN_CTL_LOCKLO_MASK;
758 reg |= (spdif->trk << IMG_SPDIF_IN_CTL_TRK_SHIFT) &
759 IMG_SPDIF_IN_CTL_TRK_MASK;
760 img_spdif_in_writel(spdif, reg, IMG_SPDIF_IN_CTL);
762 ret = devm_snd_soc_register_component(&pdev->dev,
763 &img_spdif_in_component, &img_spdif_in_dai, 1);
765 goto err_clk_disable;
767 ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
769 goto err_clk_disable;
774 clk_disable_unprepare(spdif->clk_sys);
779 static int img_spdif_in_dev_remove(struct platform_device *pdev)
781 struct img_spdif_in *spdif = platform_get_drvdata(pdev);
783 clk_disable_unprepare(spdif->clk_sys);
788 static const struct of_device_id img_spdif_in_of_match[] = {
789 { .compatible = "img,spdif-in" },
792 MODULE_DEVICE_TABLE(of, img_spdif_in_of_match);
794 static struct platform_driver img_spdif_in_driver = {
796 .name = "img-spdif-in",
797 .of_match_table = img_spdif_in_of_match
799 .probe = img_spdif_in_probe,
800 .remove = img_spdif_in_dev_remove
802 module_platform_driver(img_spdif_in_driver);
804 MODULE_AUTHOR("Damien Horsley <Damien.Horsley@imgtec.com>");
805 MODULE_DESCRIPTION("IMG SPDIF Input driver");
806 MODULE_LICENSE("GPL v2");