microsoft
/
WSL2-Linux-Kernel
зеркало из https://github.com/microsoft/WSL2-Linux-Kernel.git
1
0
Форкнуть 0
Код Задачи Пакеты Проекты Релизы Вики Активность
WSL2-Linux-Kernel/sound/arm/aaci.c

971 строка
21 KiB
C
Исходник Ответственный История

/*
* linux/sound/arm/aaci.c - ARM PrimeCell AACI PL041 driver
*
* Copyright (C) 2003 Deep Blue Solutions Ltd, All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Documentation: ARM DDI 0173B
*/
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/device.h>
#include <linux/spinlock.h>
#include <linux/interrupt.h>
#include <linux/err.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/hardware/amba.h>
#include <sound/driver.h>
#include <sound/core.h>
#include <sound/initval.h>
#include <sound/ac97_codec.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include "aaci.h"
#include "devdma.h"
#define DRIVER_NAME "aaci-pl041"
/*
* PM support is not complete. Turn it off.
*/
#undef CONFIG_PM
static void aaci_ac97_select_codec(struct aaci *aaci, ac97_t *ac97)
{
u32 v, maincr = aaci->maincr | MAINCR_SCRA(ac97->num);
/*
* Ensure that the slot 1/2 RX registers are empty.
*/
v = readl(aaci->base + AACI_SLFR);
if (v & SLFR_2RXV)
readl(aaci->base + AACI_SL2RX);
if (v & SLFR_1RXV)
readl(aaci->base + AACI_SL1RX);
writel(maincr, aaci->base + AACI_MAINCR);
}
/*
* P29:
* The recommended use of programming the external codec through slot 1
* and slot 2 data is to use the channels during setup routines and the
* slot register at any other time. The data written into slot 1, slot 2
* and slot 12 registers is transmitted only when their corresponding
* SI1TxEn, SI2TxEn and SI12TxEn bits are set in the AACI_MAINCR
* register.
*/
static void aaci_ac97_write(ac97_t *ac97, unsigned short reg, unsigned short val)
{
struct aaci *aaci = ac97->private_data;
u32 v;
if (ac97->num >= 4)
return;
down(&aaci->ac97_sem);
aaci_ac97_select_codec(aaci, ac97);
/*
* P54: You must ensure that AACI_SL2TX is always written
* to, if required, before data is written to AACI_SL1TX.
*/
writel(val << 4, aaci->base + AACI_SL2TX);
writel(reg << 12, aaci->base + AACI_SL1TX);
/*
* Wait for the transmission of both slots to complete.
*/
do {
v = readl(aaci->base + AACI_SLFR);
} while (v & (SLFR_1TXB|SLFR_2TXB));
up(&aaci->ac97_sem);
}
/*
* Read an AC'97 register.
*/
static unsigned short aaci_ac97_read(ac97_t *ac97, unsigned short reg)
{
struct aaci *aaci = ac97->private_data;
u32 v;
if (ac97->num >= 4)
return ~0;
down(&aaci->ac97_sem);
aaci_ac97_select_codec(aaci, ac97);
/*
* Write the register address to slot 1.
*/
writel((reg << 12) | (1 << 19), aaci->base + AACI_SL1TX);
/*
* Wait for the transmission to complete.
*/
do {
v = readl(aaci->base + AACI_SLFR);
} while (v & SLFR_1TXB);
/*
* Give the AC'97 codec more than enough time
* to respond. (42us = ~2 frames at 48kHz.)
*/
udelay(42);
/*
* Wait for slot 2 to indicate data.
*/
do {
cond_resched();
v = readl(aaci->base + AACI_SLFR) & (SLFR_1RXV|SLFR_2RXV);
} while (v != (SLFR_1RXV|SLFR_2RXV));
v = readl(aaci->base + AACI_SL1RX) >> 12;
if (v == reg) {
v = readl(aaci->base + AACI_SL2RX) >> 4;
} else {
dev_err(&aaci->dev->dev,
"wrong ac97 register read back (%x != %x)\n",
v, reg);
v = ~0;
}
up(&aaci->ac97_sem);
return v;
}
static inline void aaci_chan_wait_ready(struct aaci_runtime *aacirun)
{
u32 val;
int timeout = 5000;
do {
val = readl(aacirun->base + AACI_SR);
} while (val & (SR_TXB|SR_RXB) && timeout--);
}
/*
* Interrupt support.
*/
static void aaci_fifo_irq(struct aaci *aaci, u32 mask)
{
if (mask & ISR_URINTR) {
writel(ICLR_TXUEC1, aaci->base + AACI_INTCLR);
}
if (mask & ISR_TXINTR) {
struct aaci_runtime *aacirun = &aaci->playback;
void *ptr;
if (!aacirun->substream || !aacirun->start) {
dev_warn(&aaci->dev->dev, "TX interrupt???");
writel(0, aacirun->base + AACI_IE);
return;
}
ptr = aacirun->ptr;
do {
unsigned int len = aacirun->fifosz;
u32 val;
if (aacirun->bytes <= 0) {
aacirun->bytes += aacirun->period;
aacirun->ptr = ptr;
spin_unlock(&aaci->lock);
snd_pcm_period_elapsed(aacirun->substream);
spin_lock(&aaci->lock);
}
if (!(aacirun->cr & TXCR_TXEN))
break;
val = readl(aacirun->base + AACI_SR);
if (!(val & SR_TXHE))
break;
if (!(val & SR_TXFE))
len >>= 1;
aacirun->bytes -= len;
/* writing 16 bytes at a time */
for ( ; len > 0; len -= 16) {
asm(
"ldmia %0!, {r0, r1, r2, r3}\n\t"
"stmia %1, {r0, r1, r2, r3}"
: "+r" (ptr)
: "r" (aacirun->fifo)
: "r0", "r1", "r2", "r3", "cc");
if (ptr >= aacirun->end)
ptr = aacirun->start;
}
} while (1);
aacirun->ptr = ptr;
}
}
static irqreturn_t aaci_irq(int irq, void *devid, struct pt_regs *regs)
{
struct aaci *aaci = devid;
u32 mask;
int i;
spin_lock(&aaci->lock);
mask = readl(aaci->base + AACI_ALLINTS);
if (mask) {
u32 m = mask;
for (i = 0; i < 4; i++, m >>= 7) {
if (m & 0x7f) {
aaci_fifo_irq(aaci, m);
}
}
}
spin_unlock(&aaci->lock);
return mask ? IRQ_HANDLED : IRQ_NONE;
}
/*
* ALSA support.
*/
struct aaci_stream {
unsigned char codec_idx;
unsigned char rate_idx;
};
static struct aaci_stream aaci_streams[] = {
[ACSTREAM_FRONT] = {
.codec_idx = 0,
.rate_idx = AC97_RATES_FRONT_DAC,
},
[ACSTREAM_SURROUND] = {
.codec_idx = 0,
.rate_idx = AC97_RATES_SURR_DAC,
},
[ACSTREAM_LFE] = {
.codec_idx = 0,
.rate_idx = AC97_RATES_LFE_DAC,
},
};
static inline unsigned int aaci_rate_mask(struct aaci *aaci, int streamid)
{
struct aaci_stream *s = aaci_streams + streamid;
return aaci->ac97_bus->codec[s->codec_idx]->rates[s->rate_idx];
}
static unsigned int rate_list[] = {
5512, 8000, 11025, 16000, 22050, 32000, 44100,
48000, 64000, 88200, 96000, 176400, 192000
};
/*
* Double-rate rule: we can support double rate iff channels == 2
* (unimplemented)
*/
static int
aaci_rule_rate_by_channels(snd_pcm_hw_params_t *p, snd_pcm_hw_rule_t *rule)
{
struct aaci *aaci = rule->private;
unsigned int rate_mask = SNDRV_PCM_RATE_8000_48000|SNDRV_PCM_RATE_5512;
snd_interval_t *c = hw_param_interval(p, SNDRV_PCM_HW_PARAM_CHANNELS);
switch (c->max) {
case 6:
rate_mask &= aaci_rate_mask(aaci, ACSTREAM_LFE);
case 4:
rate_mask &= aaci_rate_mask(aaci, ACSTREAM_SURROUND);
case 2:
rate_mask &= aaci_rate_mask(aaci, ACSTREAM_FRONT);
}
return snd_interval_list(hw_param_interval(p, rule->var),
ARRAY_SIZE(rate_list), rate_list,
rate_mask);
}
static snd_pcm_hardware_t aaci_hw_info = {
.info = SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_MMAP_VALID |
SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_BLOCK_TRANSFER |
SNDRV_PCM_INFO_RESUME,
/*
* ALSA doesn't support 18-bit or 20-bit packed into 32-bit
* words. It also doesn't support 12-bit at all.
*/
.formats = SNDRV_PCM_FMTBIT_S16_LE,
/* should this be continuous or knot? */
.rates = SNDRV_PCM_RATE_CONTINUOUS,
.rate_max = 48000,
.rate_min = 4000,
.channels_min = 2,
.channels_max = 6,
.buffer_bytes_max = 64 * 1024,
.period_bytes_min = 256,
.period_bytes_max = PAGE_SIZE,
.periods_min = 4,
.periods_max = PAGE_SIZE / 16,
};
static int aaci_pcm_open(struct aaci *aaci, snd_pcm_substream_t *substream,
struct aaci_runtime *aacirun)
{
snd_pcm_runtime_t *runtime = substream->runtime;
int ret;
aacirun->substream = substream;
runtime->private_data = aacirun;
runtime->hw = aaci_hw_info;
/*
* FIXME: ALSA specifies fifo_size in bytes. If we're in normal
* mode, each 32-bit word contains one sample. If we're in
* compact mode, each 32-bit word contains two samples, effectively
* halving the FIFO size. However, we don't know for sure which
* we'll be using at this point. We set this to the lower limit.
*/
runtime->hw.fifo_size = aaci->fifosize * 2;
/*
* Add rule describing hardware rate dependency
* on the number of channels.
*/
ret = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
aaci_rule_rate_by_channels, aaci,
SNDRV_PCM_HW_PARAM_CHANNELS,
SNDRV_PCM_HW_PARAM_RATE, -1);
if (ret)
goto out;
ret = request_irq(aaci->dev->irq[0], aaci_irq, SA_SHIRQ|SA_INTERRUPT,
DRIVER_NAME, aaci);
if (ret)
goto out;
return 0;
out:
return ret;
}
/*
* Common ALSA stuff
*/
static int aaci_pcm_close(snd_pcm_substream_t *substream)
{
struct aaci *aaci = substream->private_data;
struct aaci_runtime *aacirun = substream->runtime->private_data;
WARN_ON(aacirun->cr & TXCR_TXEN);
aacirun->substream = NULL;
free_irq(aaci->dev->irq[0], aaci);
return 0;
}
static int aaci_pcm_hw_free(snd_pcm_substream_t *substream)
{
struct aaci_runtime *aacirun = substream->runtime->private_data;
/*
* This must not be called with the device enabled.
*/
WARN_ON(aacirun->cr & TXCR_TXEN);
if (aacirun->pcm_open)
snd_ac97_pcm_close(aacirun->pcm);
aacirun->pcm_open = 0;
/*
* Clear out the DMA and any allocated buffers.
*/
devdma_hw_free(NULL, substream);
return 0;
}
static int aaci_pcm_hw_params(snd_pcm_substream_t *substream,
struct aaci_runtime *aacirun,
snd_pcm_hw_params_t *params)
{
int err;
aaci_pcm_hw_free(substream);
err = devdma_hw_alloc(NULL, substream,
params_buffer_bytes(params));
if (err < 0)
goto out;
err = snd_ac97_pcm_open(aacirun->pcm, params_rate(params),
params_channels(params),
aacirun->pcm->r[0].slots);
if (err)
goto out;
aacirun->pcm_open = 1;
out:
return err;
}
static int aaci_pcm_prepare(snd_pcm_substream_t *substream)
{
snd_pcm_runtime_t *runtime = substream->runtime;
struct aaci_runtime *aacirun = runtime->private_data;
aacirun->start = (void *)runtime->dma_area;
aacirun->end = aacirun->start + runtime->dma_bytes;
aacirun->ptr = aacirun->start;
aacirun->period =
aacirun->bytes = frames_to_bytes(runtime, runtime->period_size);
return 0;
}
static snd_pcm_uframes_t aaci_pcm_pointer(snd_pcm_substream_t *substream)
{
snd_pcm_runtime_t *runtime = substream->runtime;
struct aaci_runtime *aacirun = runtime->private_data;
ssize_t bytes = aacirun->ptr - aacirun->start;
return bytes_to_frames(runtime, bytes);
}
static int aaci_pcm_mmap(snd_pcm_substream_t *substream, struct vm_area_struct *vma)
{
return devdma_mmap(NULL, substream, vma);
}
/*
* Playback specific ALSA stuff
*/
static const u32 channels_to_txmask[] = {
[2] = TXCR_TX3 | TXCR_TX4,
[4] = TXCR_TX3 | TXCR_TX4 | TXCR_TX7 | TXCR_TX8,
[6] = TXCR_TX3 | TXCR_TX4 | TXCR_TX7 | TXCR_TX8 | TXCR_TX6 | TXCR_TX9,
};
/*
* We can support two and four channel audio. Unfortunately
* six channel audio requires a non-standard channel ordering:
* 2 -> FL(3), FR(4)
* 4 -> FL(3), FR(4), SL(7), SR(8)
* 6 -> FL(3), FR(4), SL(7), SR(8), C(6), LFE(9) (required)
* FL(3), FR(4), C(6), SL(7), SR(8), LFE(9) (actual)
* This requires an ALSA configuration file to correct.
*/
static unsigned int channel_list[] = { 2, 4, 6 };
static int
aaci_rule_channels(snd_pcm_hw_params_t *p, snd_pcm_hw_rule_t *rule)
{
struct aaci *aaci = rule->private;
unsigned int chan_mask = 1 << 0, slots;
/*
* pcms[0] is the our 5.1 PCM instance.
*/
slots = aaci->ac97_bus->pcms[0].r[0].slots;
if (slots & (1 << AC97_SLOT_PCM_SLEFT)) {
chan_mask |= 1 << 1;
if (slots & (1 << AC97_SLOT_LFE))
chan_mask |= 1 << 2;
}
return snd_interval_list(hw_param_interval(p, rule->var),
ARRAY_SIZE(channel_list), channel_list,
chan_mask);
}
static int aaci_pcm_playback_open(snd_pcm_substream_t *substream)
{
struct aaci *aaci = substream->private_data;
int ret;
/*
* Add rule describing channel dependency.
*/
ret = snd_pcm_hw_rule_add(substream->runtime, 0,
SNDRV_PCM_HW_PARAM_CHANNELS,
aaci_rule_channels, aaci,
SNDRV_PCM_HW_PARAM_CHANNELS, -1);
if (ret)
return ret;
return aaci_pcm_open(aaci, substream, &aaci->playback);
}
static int aaci_pcm_playback_hw_params(snd_pcm_substream_t *substream,
snd_pcm_hw_params_t *params)
{
struct aaci *aaci = substream->private_data;
struct aaci_runtime *aacirun = substream->runtime->private_data;
unsigned int channels = params_channels(params);
int ret;
WARN_ON(channels >= ARRAY_SIZE(channels_to_txmask) ||
!channels_to_txmask[channels]);
ret = aaci_pcm_hw_params(substream, aacirun, params);
/*
* Enable FIFO, compact mode, 16 bits per sample.
* FIXME: double rate slots?
*/
if (ret >= 0) {
aacirun->cr = TXCR_FEN | TXCR_COMPACT | TXCR_TSZ16;
aacirun->cr |= channels_to_txmask[channels];
aacirun->fifosz = aaci->fifosize * 4;
if (aacirun->cr & TXCR_COMPACT)
aacirun->fifosz >>= 1;
}
return ret;
}
static void aaci_pcm_playback_stop(struct aaci_runtime *aacirun)
{
u32 ie;
ie = readl(aacirun->base + AACI_IE);
ie &= ~(IE_URIE|IE_TXIE);
writel(ie, aacirun->base + AACI_IE);
aacirun->cr &= ~TXCR_TXEN;
aaci_chan_wait_ready(aacirun);
writel(aacirun->cr, aacirun->base + AACI_TXCR);
}
static void aaci_pcm_playback_start(struct aaci_runtime *aacirun)
{
u32 ie;
aaci_chan_wait_ready(aacirun);
aacirun->cr |= TXCR_TXEN;
ie = readl(aacirun->base + AACI_IE);
ie |= IE_URIE | IE_TXIE;
writel(ie, aacirun->base + AACI_IE);
writel(aacirun->cr, aacirun->base + AACI_TXCR);
}
static int aaci_pcm_playback_trigger(snd_pcm_substream_t *substream, int cmd)
{
struct aaci *aaci = substream->private_data;
struct aaci_runtime *aacirun = substream->runtime->private_data;
unsigned long flags;
int ret = 0;
spin_lock_irqsave(&aaci->lock, flags);
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
aaci_pcm_playback_start(aacirun);
break;
case SNDRV_PCM_TRIGGER_RESUME:
aaci_pcm_playback_start(aacirun);
break;
case SNDRV_PCM_TRIGGER_STOP:
aaci_pcm_playback_stop(aacirun);
break;
case SNDRV_PCM_TRIGGER_SUSPEND:
aaci_pcm_playback_stop(aacirun);
break;
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
break;
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
break;
default:
ret = -EINVAL;
}
spin_unlock_irqrestore(&aaci->lock, flags);
return ret;
}
static snd_pcm_ops_t aaci_playback_ops = {
.open = aaci_pcm_playback_open,
.close = aaci_pcm_close,
.ioctl = snd_pcm_lib_ioctl,
.hw_params = aaci_pcm_playback_hw_params,
.hw_free = aaci_pcm_hw_free,
.prepare = aaci_pcm_prepare,
.trigger = aaci_pcm_playback_trigger,
.pointer = aaci_pcm_pointer,
.mmap = aaci_pcm_mmap,
};
/*
* Power Management.
*/
#ifdef CONFIG_PM
static int aaci_do_suspend(snd_card_t *card, unsigned int state)
{
struct aaci *aaci = card->private_data;
if (aaci->card->power_state != SNDRV_CTL_POWER_D3cold) {
snd_pcm_suspend_all(aaci->pcm);
snd_power_change_state(aaci->card, SNDRV_CTL_POWER_D3cold);
}
return 0;
}
static int aaci_do_resume(snd_card_t *card, unsigned int state)
{
struct aaci *aaci = card->private_data;
if (aaci->card->power_state != SNDRV_CTL_POWER_D0) {
snd_power_change_state(aaci->card, SNDRV_CTL_POWER_D0);
}
return 0;
}
static int aaci_suspend(struct amba_device *dev, pm_message_t state)
{
snd_card_t *card = amba_get_drvdata(dev);
return card ? aaci_do_suspend(card) : 0;
}
static int aaci_resume(struct amba_device *dev)
{
snd_card_t *card = amba_get_drvdata(dev);
return card ? aaci_do_resume(card) : 0;
}
#else
#define aaci_do_suspend NULL
#define aaci_do_resume NULL
#define aaci_suspend NULL
#define aaci_resume NULL
#endif
static struct ac97_pcm ac97_defs[] __devinitdata = {
[0] = { /* Front PCM */
.exclusive = 1,
.r = {
[0] = {
.slots = (1 << AC97_SLOT_PCM_LEFT) |
(1 << AC97_SLOT_PCM_RIGHT) |
(1 << AC97_SLOT_PCM_CENTER) |
(1 << AC97_SLOT_PCM_SLEFT) |
(1 << AC97_SLOT_PCM_SRIGHT) |
(1 << AC97_SLOT_LFE),
},
},
},
[1] = { /* PCM in */
.stream = 1,
.exclusive = 1,
.r = {
[0] = {
.slots = (1 << AC97_SLOT_PCM_LEFT) |
(1 << AC97_SLOT_PCM_RIGHT),
},
},
},
[2] = { /* Mic in */
.stream = 1,
.exclusive = 1,
.r = {
[0] = {
.slots = (1 << AC97_SLOT_MIC),
},
},
}
};
static ac97_bus_ops_t aaci_bus_ops = {
.write = aaci_ac97_write,
.read = aaci_ac97_read,
};
static int __devinit aaci_probe_ac97(struct aaci *aaci)
{
ac97_template_t ac97_template;
ac97_bus_t *ac97_bus;
ac97_t *ac97;
int ret;
/*
* Assert AACIRESET for 2us
*/
writel(0, aaci->base + AACI_RESET);
udelay(2);
writel(RESET_NRST, aaci->base + AACI_RESET);
/*
* Give the AC'97 codec more than enough time
* to wake up. (42us = ~2 frames at 48kHz.)
*/
udelay(42);
ret = snd_ac97_bus(aaci->card, 0, &aaci_bus_ops, aaci, &ac97_bus);
if (ret)
goto out;
ac97_bus->clock = 48000;
aaci->ac97_bus = ac97_bus;
memset(&ac97_template, 0, sizeof(ac97_template_t));
ac97_template.private_data = aaci;
ac97_template.num = 0;
ac97_template.scaps = AC97_SCAP_SKIP_MODEM;
ret = snd_ac97_mixer(ac97_bus, &ac97_template, &ac97);
if (ret)
goto out;
/*
* Disable AC97 PC Beep input on audio codecs.
*/
if (ac97_is_audio(ac97))
snd_ac97_write_cache(ac97, AC97_PC_BEEP, 0x801e);
ret = snd_ac97_pcm_assign(ac97_bus, ARRAY_SIZE(ac97_defs), ac97_defs);
if (ret)
goto out;
aaci->playback.pcm = &ac97_bus->pcms[0];
out:
return ret;
}
static void aaci_free_card(snd_card_t *card)
{
struct aaci *aaci = card->private_data;
if (aaci->base)
iounmap(aaci->base);
}
static struct aaci * __devinit aaci_init_card(struct amba_device *dev)
{
struct aaci *aaci;
snd_card_t *card;
card = snd_card_new(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
THIS_MODULE, sizeof(struct aaci));
if (card == NULL)
return ERR_PTR(-ENOMEM);
card->private_free = aaci_free_card;
snd_card_set_pm_callback(card, aaci_do_suspend, aaci_do_resume, NULL);
strlcpy(card->driver, DRIVER_NAME, sizeof(card->driver));
strlcpy(card->shortname, "ARM AC'97 Interface", sizeof(card->shortname));
snprintf(card->longname, sizeof(card->longname),
"%s at 0x%08lx, irq %d",
card->shortname, dev->res.start, dev->irq[0]);
aaci = card->private_data;
init_MUTEX(&aaci->ac97_sem);
spin_lock_init(&aaci->lock);
aaci->card = card;
aaci->dev = dev;
/* Set MAINCR to allow slot 1 and 2 data IO */
aaci->maincr = MAINCR_IE | MAINCR_SL1RXEN | MAINCR_SL1TXEN |
MAINCR_SL2RXEN | MAINCR_SL2TXEN;
return aaci;
}
static int __devinit aaci_init_pcm(struct aaci *aaci)
{
snd_pcm_t *pcm;
int ret;
ret = snd_pcm_new(aaci->card, "AACI AC'97", 0, 1, 0, &pcm);
if (ret == 0) {
aaci->pcm = pcm;
pcm->private_data = aaci;
pcm->info_flags = 0;
strlcpy(pcm->name, DRIVER_NAME, sizeof(pcm->name));
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &aaci_playback_ops);
}
return ret;
}
static unsigned int __devinit aaci_size_fifo(struct aaci *aaci)
{
void __iomem *base = aaci->base + AACI_CSCH1;
int i;
writel(TXCR_FEN | TXCR_TSZ16 | TXCR_TXEN, base + AACI_TXCR);
for (i = 0; !(readl(base + AACI_SR) & SR_TXFF) && i < 4096; i++)
writel(0, aaci->base + AACI_DR1);
writel(0, base + AACI_TXCR);
/*
* Re-initialise the AACI after the FIFO depth test, to
* ensure that the FIFOs are empty. Unfortunately, merely
* disabling the channel doesn't clear the FIFO.
*/
writel(aaci->maincr & ~MAINCR_IE, aaci->base + AACI_MAINCR);
writel(aaci->maincr, aaci->base + AACI_MAINCR);
/*
* If we hit 4096, we failed. Go back to the specified
* fifo depth.
*/
if (i == 4096)
i = 8;
return i;
}
static int __devinit aaci_probe(struct amba_device *dev, void *id)
{
struct aaci *aaci;
int ret, i;
ret = amba_request_regions(dev, NULL);
if (ret)
return ret;
aaci = aaci_init_card(dev);
if (IS_ERR(aaci)) {
ret = PTR_ERR(aaci);
goto out;
}
aaci->base = ioremap(dev->res.start, SZ_4K);
if (!aaci->base) {
ret = -ENOMEM;
goto out;
}
/*
* Playback uses AACI channel 0
*/
aaci->playback.base = aaci->base + AACI_CSCH1;
aaci->playback.fifo = aaci->base + AACI_DR1;
for (i = 0; i < 4; i++) {
void __iomem *base = aaci->base + i * 0x14;
writel(0, base + AACI_IE);
writel(0, base + AACI_TXCR);
writel(0, base + AACI_RXCR);
}
writel(0x1fff, aaci->base + AACI_INTCLR);
writel(aaci->maincr, aaci->base + AACI_MAINCR);
/*
* Size the FIFOs.
*/
aaci->fifosize = aaci_size_fifo(aaci);
ret = aaci_probe_ac97(aaci);
if (ret)
goto out;
ret = aaci_init_pcm(aaci);
if (ret)
goto out;
snd_card_set_dev(aaci->card, &dev->dev);
ret = snd_card_register(aaci->card);
if (ret == 0) {
dev_info(&dev->dev, "%s, fifo %d\n", aaci->card->longname,
aaci->fifosize);
amba_set_drvdata(dev, aaci->card);
return ret;
}
out:
if (aaci)
snd_card_free(aaci->card);
amba_release_regions(dev);
return ret;
}
static int __devexit aaci_remove(struct amba_device *dev)
{
snd_card_t *card = amba_get_drvdata(dev);
amba_set_drvdata(dev, NULL);
if (card) {
struct aaci *aaci = card->private_data;
writel(0, aaci->base + AACI_MAINCR);
snd_card_free(card);
amba_release_regions(dev);
}
return 0;
}
static struct amba_id aaci_ids[] = {
{
.id = 0x00041041,
.mask = 0x000fffff,
},
{ 0, 0 },
};
static struct amba_driver aaci_driver = {
.drv = {
.name = DRIVER_NAME,
},
.probe = aaci_probe,
.remove = __devexit_p(aaci_remove),
.suspend = aaci_suspend,
.resume = aaci_resume,
.id_table = aaci_ids,
};
static int __init aaci_init(void)
{
return amba_driver_register(&aaci_driver);
}
static void __exit aaci_exit(void)
{
amba_driver_unregister(&aaci_driver);
}
module_init(aaci_init);
module_exit(aaci_exit);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("ARM PrimeCell PL041 Advanced Audio CODEC Interface driver");
Ссылка в новой задаче Показать git blame Копировать постоянную ссылку