2 * linux/sound/arm/aaci.c - ARM PrimeCell AACI PL041 driver
4 * Copyright (C) 2003 Deep Blue Solutions Ltd, All Rights Reserved.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
10 * Documentation: ARM DDI 0173B
12 #include <linux/module.h>
13 #include <linux/delay.h>
14 #include <linux/init.h>
15 #include <linux/ioport.h>
16 #include <linux/device.h>
17 #include <linux/spinlock.h>
18 #include <linux/interrupt.h>
19 #include <linux/err.h>
20 #include <linux/amba/bus.h>
24 #include <asm/sizes.h>
26 #include <sound/driver.h>
27 #include <sound/core.h>
28 #include <sound/initval.h>
29 #include <sound/ac97_codec.h>
30 #include <sound/pcm.h>
31 #include <sound/pcm_params.h>
36 #define DRIVER_NAME "aaci-pl041"
39 * PM support is not complete. Turn it off.
43 static void aaci_ac97_select_codec(struct aaci *aaci, struct snd_ac97 *ac97)
45 u32 v, maincr = aaci->maincr | MAINCR_SCRA(ac97->num);
48 * Ensure that the slot 1/2 RX registers are empty.
50 v = readl(aaci->base + AACI_SLFR);
52 readl(aaci->base + AACI_SL2RX);
54 readl(aaci->base + AACI_SL1RX);
56 writel(maincr, aaci->base + AACI_MAINCR);
61 * The recommended use of programming the external codec through slot 1
62 * and slot 2 data is to use the channels during setup routines and the
63 * slot register at any other time. The data written into slot 1, slot 2
64 * and slot 12 registers is transmitted only when their corresponding
65 * SI1TxEn, SI2TxEn and SI12TxEn bits are set in the AACI_MAINCR
68 static void aaci_ac97_write(struct snd_ac97 *ac97, unsigned short reg, unsigned short val)
70 struct aaci *aaci = ac97->private_data;
76 mutex_lock(&aaci->ac97_sem);
78 aaci_ac97_select_codec(aaci, ac97);
81 * P54: You must ensure that AACI_SL2TX is always written
82 * to, if required, before data is written to AACI_SL1TX.
84 writel(val << 4, aaci->base + AACI_SL2TX);
85 writel(reg << 12, aaci->base + AACI_SL1TX);
88 * Wait for the transmission of both slots to complete.
91 v = readl(aaci->base + AACI_SLFR);
92 } while (v & (SLFR_1TXB|SLFR_2TXB));
94 mutex_unlock(&aaci->ac97_sem);
98 * Read an AC'97 register.
100 static unsigned short aaci_ac97_read(struct snd_ac97 *ac97, unsigned short reg)
102 struct aaci *aaci = ac97->private_data;
108 mutex_lock(&aaci->ac97_sem);
110 aaci_ac97_select_codec(aaci, ac97);
113 * Write the register address to slot 1.
115 writel((reg << 12) | (1 << 19), aaci->base + AACI_SL1TX);
118 * Wait for the transmission to complete.
121 v = readl(aaci->base + AACI_SLFR);
122 } while (v & SLFR_1TXB);
125 * Give the AC'97 codec more than enough time
126 * to respond. (42us = ~2 frames at 48kHz.)
131 * Wait for slot 2 to indicate data.
135 v = readl(aaci->base + AACI_SLFR) & (SLFR_1RXV|SLFR_2RXV);
136 } while (v != (SLFR_1RXV|SLFR_2RXV));
138 v = readl(aaci->base + AACI_SL1RX) >> 12;
140 v = readl(aaci->base + AACI_SL2RX) >> 4;
142 dev_err(&aaci->dev->dev,
143 "wrong ac97 register read back (%x != %x)\n",
148 mutex_unlock(&aaci->ac97_sem);
152 static inline void aaci_chan_wait_ready(struct aaci_runtime *aacirun)
158 val = readl(aacirun->base + AACI_SR);
159 } while (val & (SR_TXB|SR_RXB) && timeout--);
167 static void aaci_fifo_irq(struct aaci *aaci, int channel, u32 mask)
169 if (mask & ISR_URINTR) {
170 dev_dbg(&aaci->dev->dev, "TX underrun on chan %d\n", channel);
171 writel(ICLR_TXUEC1 << channel, aaci->base + AACI_INTCLR);
174 if (mask & ISR_TXINTR) {
175 struct aaci_runtime *aacirun = &aaci->playback;
178 if (!aacirun->substream || !aacirun->start) {
179 dev_warn(&aaci->dev->dev, "TX interrupt???");
180 writel(0, aacirun->base + AACI_IE);
186 unsigned int len = aacirun->fifosz;
189 if (aacirun->bytes <= 0) {
190 aacirun->bytes += aacirun->period;
192 spin_unlock(&aaci->lock);
193 snd_pcm_period_elapsed(aacirun->substream);
194 spin_lock(&aaci->lock);
196 if (!(aacirun->cr & TXCR_TXEN))
199 val = readl(aacirun->base + AACI_SR);
200 if (!(val & SR_TXHE))
202 if (!(val & SR_TXFE))
205 aacirun->bytes -= len;
207 /* writing 16 bytes at a time */
208 for ( ; len > 0; len -= 16) {
210 "ldmia %0!, {r0, r1, r2, r3}\n\t"
211 "stmia %1, {r0, r1, r2, r3}"
213 : "r" (aacirun->fifo)
214 : "r0", "r1", "r2", "r3", "cc");
216 if (ptr >= aacirun->end)
217 ptr = aacirun->start;
225 static irqreturn_t aaci_irq(int irq, void *devid)
227 struct aaci *aaci = devid;
231 spin_lock(&aaci->lock);
232 mask = readl(aaci->base + AACI_ALLINTS);
235 for (i = 0; i < 4; i++, m >>= 7) {
237 aaci_fifo_irq(aaci, i, m);
241 spin_unlock(&aaci->lock);
243 return mask ? IRQ_HANDLED : IRQ_NONE;
253 unsigned char codec_idx;
254 unsigned char rate_idx;
257 static struct aaci_stream aaci_streams[] = {
260 .rate_idx = AC97_RATES_FRONT_DAC,
262 [ACSTREAM_SURROUND] = {
264 .rate_idx = AC97_RATES_SURR_DAC,
268 .rate_idx = AC97_RATES_LFE_DAC,
272 static inline unsigned int aaci_rate_mask(struct aaci *aaci, int streamid)
274 struct aaci_stream *s = aaci_streams + streamid;
275 return aaci->ac97_bus->codec[s->codec_idx]->rates[s->rate_idx];
278 static unsigned int rate_list[] = {
279 5512, 8000, 11025, 16000, 22050, 32000, 44100,
280 48000, 64000, 88200, 96000, 176400, 192000
284 * Double-rate rule: we can support double rate iff channels == 2
288 aaci_rule_rate_by_channels(struct snd_pcm_hw_params *p, struct snd_pcm_hw_rule *rule)
290 struct aaci *aaci = rule->private;
291 unsigned int rate_mask = SNDRV_PCM_RATE_8000_48000|SNDRV_PCM_RATE_5512;
292 struct snd_interval *c = hw_param_interval(p, SNDRV_PCM_HW_PARAM_CHANNELS);
296 rate_mask &= aaci_rate_mask(aaci, ACSTREAM_LFE);
298 rate_mask &= aaci_rate_mask(aaci, ACSTREAM_SURROUND);
300 rate_mask &= aaci_rate_mask(aaci, ACSTREAM_FRONT);
303 return snd_interval_list(hw_param_interval(p, rule->var),
304 ARRAY_SIZE(rate_list), rate_list,
308 static struct snd_pcm_hardware aaci_hw_info = {
309 .info = SNDRV_PCM_INFO_MMAP |
310 SNDRV_PCM_INFO_MMAP_VALID |
311 SNDRV_PCM_INFO_INTERLEAVED |
312 SNDRV_PCM_INFO_BLOCK_TRANSFER |
313 SNDRV_PCM_INFO_RESUME,
316 * ALSA doesn't support 18-bit or 20-bit packed into 32-bit
317 * words. It also doesn't support 12-bit at all.
319 .formats = SNDRV_PCM_FMTBIT_S16_LE,
321 /* should this be continuous or knot? */
322 .rates = SNDRV_PCM_RATE_CONTINUOUS,
327 .buffer_bytes_max = 64 * 1024,
328 .period_bytes_min = 256,
329 .period_bytes_max = PAGE_SIZE,
331 .periods_max = PAGE_SIZE / 16,
334 static int aaci_pcm_open(struct aaci *aaci, struct snd_pcm_substream *substream,
335 struct aaci_runtime *aacirun)
337 struct snd_pcm_runtime *runtime = substream->runtime;
340 aacirun->substream = substream;
341 runtime->private_data = aacirun;
342 runtime->hw = aaci_hw_info;
345 * FIXME: ALSA specifies fifo_size in bytes. If we're in normal
346 * mode, each 32-bit word contains one sample. If we're in
347 * compact mode, each 32-bit word contains two samples, effectively
348 * halving the FIFO size. However, we don't know for sure which
349 * we'll be using at this point. We set this to the lower limit.
351 runtime->hw.fifo_size = aaci->fifosize * 2;
354 * Add rule describing hardware rate dependency
355 * on the number of channels.
357 ret = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
358 aaci_rule_rate_by_channels, aaci,
359 SNDRV_PCM_HW_PARAM_CHANNELS,
360 SNDRV_PCM_HW_PARAM_RATE, -1);
364 ret = request_irq(aaci->dev->irq[0], aaci_irq, IRQF_SHARED|IRQF_DISABLED,
379 static int aaci_pcm_close(struct snd_pcm_substream *substream)
381 struct aaci *aaci = substream->private_data;
382 struct aaci_runtime *aacirun = substream->runtime->private_data;
384 WARN_ON(aacirun->cr & TXCR_TXEN);
386 aacirun->substream = NULL;
387 free_irq(aaci->dev->irq[0], aaci);
392 static int aaci_pcm_hw_free(struct snd_pcm_substream *substream)
394 struct aaci_runtime *aacirun = substream->runtime->private_data;
397 * This must not be called with the device enabled.
399 WARN_ON(aacirun->cr & TXCR_TXEN);
401 if (aacirun->pcm_open)
402 snd_ac97_pcm_close(aacirun->pcm);
403 aacirun->pcm_open = 0;
406 * Clear out the DMA and any allocated buffers.
408 devdma_hw_free(NULL, substream);
413 static int aaci_pcm_hw_params(struct snd_pcm_substream *substream,
414 struct aaci_runtime *aacirun,
415 struct snd_pcm_hw_params *params)
419 aaci_pcm_hw_free(substream);
421 err = devdma_hw_alloc(NULL, substream,
422 params_buffer_bytes(params));
426 err = snd_ac97_pcm_open(aacirun->pcm, params_rate(params),
427 params_channels(params),
428 aacirun->pcm->r[0].slots);
432 aacirun->pcm_open = 1;
438 static int aaci_pcm_prepare(struct snd_pcm_substream *substream)
440 struct snd_pcm_runtime *runtime = substream->runtime;
441 struct aaci_runtime *aacirun = runtime->private_data;
443 aacirun->start = (void *)runtime->dma_area;
444 aacirun->end = aacirun->start + runtime->dma_bytes;
445 aacirun->ptr = aacirun->start;
447 aacirun->bytes = frames_to_bytes(runtime, runtime->period_size);
452 static snd_pcm_uframes_t aaci_pcm_pointer(struct snd_pcm_substream *substream)
454 struct snd_pcm_runtime *runtime = substream->runtime;
455 struct aaci_runtime *aacirun = runtime->private_data;
456 ssize_t bytes = aacirun->ptr - aacirun->start;
458 return bytes_to_frames(runtime, bytes);
461 static int aaci_pcm_mmap(struct snd_pcm_substream *substream, struct vm_area_struct *vma)
463 return devdma_mmap(NULL, substream, vma);
468 * Playback specific ALSA stuff
470 static const u32 channels_to_txmask[] = {
471 [2] = TXCR_TX3 | TXCR_TX4,
472 [4] = TXCR_TX3 | TXCR_TX4 | TXCR_TX7 | TXCR_TX8,
473 [6] = TXCR_TX3 | TXCR_TX4 | TXCR_TX7 | TXCR_TX8 | TXCR_TX6 | TXCR_TX9,
477 * We can support two and four channel audio. Unfortunately
478 * six channel audio requires a non-standard channel ordering:
480 * 4 -> FL(3), FR(4), SL(7), SR(8)
481 * 6 -> FL(3), FR(4), SL(7), SR(8), C(6), LFE(9) (required)
482 * FL(3), FR(4), C(6), SL(7), SR(8), LFE(9) (actual)
483 * This requires an ALSA configuration file to correct.
485 static unsigned int channel_list[] = { 2, 4, 6 };
488 aaci_rule_channels(struct snd_pcm_hw_params *p, struct snd_pcm_hw_rule *rule)
490 struct aaci *aaci = rule->private;
491 unsigned int chan_mask = 1 << 0, slots;
494 * pcms[0] is the our 5.1 PCM instance.
496 slots = aaci->ac97_bus->pcms[0].r[0].slots;
497 if (slots & (1 << AC97_SLOT_PCM_SLEFT)) {
499 if (slots & (1 << AC97_SLOT_LFE))
503 return snd_interval_list(hw_param_interval(p, rule->var),
504 ARRAY_SIZE(channel_list), channel_list,
508 static int aaci_pcm_playback_open(struct snd_pcm_substream *substream)
510 struct aaci *aaci = substream->private_data;
514 * Add rule describing channel dependency.
516 ret = snd_pcm_hw_rule_add(substream->runtime, 0,
517 SNDRV_PCM_HW_PARAM_CHANNELS,
518 aaci_rule_channels, aaci,
519 SNDRV_PCM_HW_PARAM_CHANNELS, -1);
523 return aaci_pcm_open(aaci, substream, &aaci->playback);
526 static int aaci_pcm_playback_hw_params(struct snd_pcm_substream *substream,
527 struct snd_pcm_hw_params *params)
529 struct aaci *aaci = substream->private_data;
530 struct aaci_runtime *aacirun = substream->runtime->private_data;
531 unsigned int channels = params_channels(params);
534 WARN_ON(channels >= ARRAY_SIZE(channels_to_txmask) ||
535 !channels_to_txmask[channels]);
537 ret = aaci_pcm_hw_params(substream, aacirun, params);
540 * Enable FIFO, compact mode, 16 bits per sample.
541 * FIXME: double rate slots?
544 aacirun->cr = TXCR_FEN | TXCR_COMPACT | TXCR_TSZ16;
545 aacirun->cr |= channels_to_txmask[channels];
547 aacirun->fifosz = aaci->fifosize * 4;
548 if (aacirun->cr & TXCR_COMPACT)
549 aacirun->fifosz >>= 1;
554 static void aaci_pcm_playback_stop(struct aaci_runtime *aacirun)
558 ie = readl(aacirun->base + AACI_IE);
559 ie &= ~(IE_URIE|IE_TXIE);
560 writel(ie, aacirun->base + AACI_IE);
561 aacirun->cr &= ~TXCR_TXEN;
562 aaci_chan_wait_ready(aacirun);
563 writel(aacirun->cr, aacirun->base + AACI_TXCR);
566 static void aaci_pcm_playback_start(struct aaci_runtime *aacirun)
570 aaci_chan_wait_ready(aacirun);
571 aacirun->cr |= TXCR_TXEN;
573 ie = readl(aacirun->base + AACI_IE);
574 ie |= IE_URIE | IE_TXIE;
575 writel(ie, aacirun->base + AACI_IE);
576 writel(aacirun->cr, aacirun->base + AACI_TXCR);
579 static int aaci_pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd)
581 struct aaci *aaci = substream->private_data;
582 struct aaci_runtime *aacirun = substream->runtime->private_data;
586 spin_lock_irqsave(&aaci->lock, flags);
588 case SNDRV_PCM_TRIGGER_START:
589 aaci_pcm_playback_start(aacirun);
592 case SNDRV_PCM_TRIGGER_RESUME:
593 aaci_pcm_playback_start(aacirun);
596 case SNDRV_PCM_TRIGGER_STOP:
597 aaci_pcm_playback_stop(aacirun);
600 case SNDRV_PCM_TRIGGER_SUSPEND:
601 aaci_pcm_playback_stop(aacirun);
604 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
607 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
613 spin_unlock_irqrestore(&aaci->lock, flags);
618 static struct snd_pcm_ops aaci_playback_ops = {
619 .open = aaci_pcm_playback_open,
620 .close = aaci_pcm_close,
621 .ioctl = snd_pcm_lib_ioctl,
622 .hw_params = aaci_pcm_playback_hw_params,
623 .hw_free = aaci_pcm_hw_free,
624 .prepare = aaci_pcm_prepare,
625 .trigger = aaci_pcm_playback_trigger,
626 .pointer = aaci_pcm_pointer,
627 .mmap = aaci_pcm_mmap,
636 static int aaci_do_suspend(struct snd_card *card, unsigned int state)
638 struct aaci *aaci = card->private_data;
639 snd_power_change_state(card, SNDRV_CTL_POWER_D3cold);
640 snd_pcm_suspend_all(aaci->pcm);
644 static int aaci_do_resume(struct snd_card *card, unsigned int state)
646 snd_power_change_state(card, SNDRV_CTL_POWER_D0);
650 static int aaci_suspend(struct amba_device *dev, pm_message_t state)
652 struct snd_card *card = amba_get_drvdata(dev);
653 return card ? aaci_do_suspend(card) : 0;
656 static int aaci_resume(struct amba_device *dev)
658 struct snd_card *card = amba_get_drvdata(dev);
659 return card ? aaci_do_resume(card) : 0;
662 #define aaci_do_suspend NULL
663 #define aaci_do_resume NULL
664 #define aaci_suspend NULL
665 #define aaci_resume NULL
669 static struct ac97_pcm ac97_defs[] __devinitdata = {
670 [0] = { /* Front PCM */
674 .slots = (1 << AC97_SLOT_PCM_LEFT) |
675 (1 << AC97_SLOT_PCM_RIGHT) |
676 (1 << AC97_SLOT_PCM_CENTER) |
677 (1 << AC97_SLOT_PCM_SLEFT) |
678 (1 << AC97_SLOT_PCM_SRIGHT) |
679 (1 << AC97_SLOT_LFE),
688 .slots = (1 << AC97_SLOT_PCM_LEFT) |
689 (1 << AC97_SLOT_PCM_RIGHT),
698 .slots = (1 << AC97_SLOT_MIC),
704 static struct snd_ac97_bus_ops aaci_bus_ops = {
705 .write = aaci_ac97_write,
706 .read = aaci_ac97_read,
709 static int __devinit aaci_probe_ac97(struct aaci *aaci)
711 struct snd_ac97_template ac97_template;
712 struct snd_ac97_bus *ac97_bus;
713 struct snd_ac97 *ac97;
717 * Assert AACIRESET for 2us
719 writel(0, aaci->base + AACI_RESET);
721 writel(RESET_NRST, aaci->base + AACI_RESET);
724 * Give the AC'97 codec more than enough time
725 * to wake up. (42us = ~2 frames at 48kHz.)
729 ret = snd_ac97_bus(aaci->card, 0, &aaci_bus_ops, aaci, &ac97_bus);
733 ac97_bus->clock = 48000;
734 aaci->ac97_bus = ac97_bus;
736 memset(&ac97_template, 0, sizeof(struct snd_ac97_template));
737 ac97_template.private_data = aaci;
738 ac97_template.num = 0;
739 ac97_template.scaps = AC97_SCAP_SKIP_MODEM;
741 ret = snd_ac97_mixer(ac97_bus, &ac97_template, &ac97);
746 * Disable AC97 PC Beep input on audio codecs.
748 if (ac97_is_audio(ac97))
749 snd_ac97_write_cache(ac97, AC97_PC_BEEP, 0x801e);
751 ret = snd_ac97_pcm_assign(ac97_bus, ARRAY_SIZE(ac97_defs), ac97_defs);
755 aaci->playback.pcm = &ac97_bus->pcms[0];
761 static void aaci_free_card(struct snd_card *card)
763 struct aaci *aaci = card->private_data;
768 static struct aaci * __devinit aaci_init_card(struct amba_device *dev)
771 struct snd_card *card;
773 card = snd_card_new(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
774 THIS_MODULE, sizeof(struct aaci));
776 return ERR_PTR(-ENOMEM);
778 card->private_free = aaci_free_card;
780 strlcpy(card->driver, DRIVER_NAME, sizeof(card->driver));
781 strlcpy(card->shortname, "ARM AC'97 Interface", sizeof(card->shortname));
782 snprintf(card->longname, sizeof(card->longname),
783 "%s at 0x%016llx, irq %d",
784 card->shortname, (unsigned long long)dev->res.start,
787 aaci = card->private_data;
788 mutex_init(&aaci->ac97_sem);
789 spin_lock_init(&aaci->lock);
793 /* Set MAINCR to allow slot 1 and 2 data IO */
794 aaci->maincr = MAINCR_IE | MAINCR_SL1RXEN | MAINCR_SL1TXEN |
795 MAINCR_SL2RXEN | MAINCR_SL2TXEN;
800 static int __devinit aaci_init_pcm(struct aaci *aaci)
805 ret = snd_pcm_new(aaci->card, "AACI AC'97", 0, 1, 0, &pcm);
808 pcm->private_data = aaci;
811 strlcpy(pcm->name, DRIVER_NAME, sizeof(pcm->name));
813 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &aaci_playback_ops);
819 static unsigned int __devinit aaci_size_fifo(struct aaci *aaci)
821 void __iomem *base = aaci->base + AACI_CSCH1;
824 writel(TXCR_FEN | TXCR_TSZ16 | TXCR_TXEN, base + AACI_TXCR);
826 for (i = 0; !(readl(base + AACI_SR) & SR_TXFF) && i < 4096; i++)
827 writel(0, aaci->base + AACI_DR1);
829 writel(0, base + AACI_TXCR);
832 * Re-initialise the AACI after the FIFO depth test, to
833 * ensure that the FIFOs are empty. Unfortunately, merely
834 * disabling the channel doesn't clear the FIFO.
836 writel(aaci->maincr & ~MAINCR_IE, aaci->base + AACI_MAINCR);
837 writel(aaci->maincr, aaci->base + AACI_MAINCR);
840 * If we hit 4096, we failed. Go back to the specified
849 static int __devinit aaci_probe(struct amba_device *dev, void *id)
854 ret = amba_request_regions(dev, NULL);
858 aaci = aaci_init_card(dev);
864 aaci->base = ioremap(dev->res.start, SZ_4K);
871 * Playback uses AACI channel 0
873 aaci->playback.base = aaci->base + AACI_CSCH1;
874 aaci->playback.fifo = aaci->base + AACI_DR1;
876 for (i = 0; i < 4; i++) {
877 void __iomem *base = aaci->base + i * 0x14;
879 writel(0, base + AACI_IE);
880 writel(0, base + AACI_TXCR);
881 writel(0, base + AACI_RXCR);
884 writel(0x1fff, aaci->base + AACI_INTCLR);
885 writel(aaci->maincr, aaci->base + AACI_MAINCR);
887 ret = aaci_probe_ac97(aaci);
892 * Size the FIFOs (must be multiple of 16).
894 aaci->fifosize = aaci_size_fifo(aaci);
895 if (aaci->fifosize & 15) {
896 printk(KERN_WARNING "AACI: fifosize = %d not supported\n",
902 ret = aaci_init_pcm(aaci);
906 snd_card_set_dev(aaci->card, &dev->dev);
908 ret = snd_card_register(aaci->card);
910 dev_info(&dev->dev, "%s, fifo %d\n", aaci->card->longname,
912 amba_set_drvdata(dev, aaci->card);
918 snd_card_free(aaci->card);
919 amba_release_regions(dev);
923 static int __devexit aaci_remove(struct amba_device *dev)
925 struct snd_card *card = amba_get_drvdata(dev);
927 amba_set_drvdata(dev, NULL);
930 struct aaci *aaci = card->private_data;
931 writel(0, aaci->base + AACI_MAINCR);
934 amba_release_regions(dev);
940 static struct amba_id aaci_ids[] = {
948 static struct amba_driver aaci_driver = {
953 .remove = __devexit_p(aaci_remove),
954 .suspend = aaci_suspend,
955 .resume = aaci_resume,
956 .id_table = aaci_ids,
959 static int __init aaci_init(void)
961 return amba_driver_register(&aaci_driver);
964 static void __exit aaci_exit(void)
966 amba_driver_unregister(&aaci_driver);
969 module_init(aaci_init);
970 module_exit(aaci_exit);
972 MODULE_LICENSE("GPL");
973 MODULE_DESCRIPTION("ARM PrimeCell PL041 Advanced Audio CODEC Interface driver");