summaryrefslogtreecommitdiffstats
path: root/sound/arm
diff options
context:
space:
mode:
Diffstat (limited to 'sound/arm')
-rw-r--r--sound/arm/Kconfig38
-rw-r--r--sound/arm/Makefile14
-rw-r--r--sound/arm/aaci.c1094
-rw-r--r--sound/arm/aaci.h247
-rw-r--r--sound/arm/pxa2xx-ac97-lib.c468
-rw-r--r--sound/arm/pxa2xx-ac97-regs.h100
-rw-r--r--sound/arm/pxa2xx-ac97.c293
-rw-r--r--sound/arm/pxa2xx-pcm-lib.c195
8 files changed, 2449 insertions, 0 deletions
diff --git a/sound/arm/Kconfig b/sound/arm/Kconfig
new file mode 100644
index 000000000..dea2c661b
--- /dev/null
+++ b/sound/arm/Kconfig
@@ -0,0 +1,38 @@
+# SPDX-License-Identifier: GPL-2.0-only
+# ALSA ARM drivers
+
+menuconfig SND_ARM
+ bool "ARM sound devices"
+ depends on ARM
+ default y
+ help
+ Support for sound devices specific to ARM architectures.
+ Drivers that are implemented on ASoC can be found in
+ "ALSA for SoC audio support" section.
+
+if SND_ARM
+
+config SND_ARMAACI
+ tristate "ARM PrimeCell PL041 AC Link support"
+ depends on ARM_AMBA
+ select SND_PCM
+ select SND_AC97_CODEC
+
+config SND_PXA2XX_AC97
+ tristate "AC97 driver for the Intel PXA2xx chip"
+ depends on ARCH_PXA
+ select SND_AC97_CODEC
+ select SND_PXA2XX_LIB
+ select SND_PXA2XX_LIB_AC97
+ help
+ Say Y or M if you want to support any AC97 codec attached to
+ the PXA2xx AC97 interface.
+
+endif # SND_ARM
+
+config SND_PXA2XX_LIB
+ tristate
+ select SND_DMAENGINE_PCM
+
+config SND_PXA2XX_LIB_AC97
+ bool
diff --git a/sound/arm/Makefile b/sound/arm/Makefile
new file mode 100644
index 000000000..34c769489
--- /dev/null
+++ b/sound/arm/Makefile
@@ -0,0 +1,14 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for ALSA
+#
+
+obj-$(CONFIG_SND_ARMAACI) += snd-aaci.o
+snd-aaci-objs := aaci.o
+
+obj-$(CONFIG_SND_PXA2XX_LIB) += snd-pxa2xx-lib.o
+snd-pxa2xx-lib-y := pxa2xx-pcm-lib.o
+snd-pxa2xx-lib-$(CONFIG_SND_PXA2XX_LIB_AC97) += pxa2xx-ac97-lib.o
+
+obj-$(CONFIG_SND_PXA2XX_AC97) += snd-pxa2xx-ac97.o
+snd-pxa2xx-ac97-objs := pxa2xx-ac97.o
diff --git a/sound/arm/aaci.c b/sound/arm/aaci.c
new file mode 100644
index 000000000..0817ad21a
--- /dev/null
+++ b/sound/arm/aaci.c
@@ -0,0 +1,1094 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * linux/sound/arm/aaci.c - ARM PrimeCell AACI PL041 driver
+ *
+ * Copyright (C) 2003 Deep Blue Solutions Ltd, All Rights Reserved.
+ *
+ * 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 <linux/amba/bus.h>
+#include <linux/io.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"
+
+#define DRIVER_NAME "aaci-pl041"
+
+#define FRAME_PERIOD_US 21
+
+/*
+ * PM support is not complete. Turn it off.
+ */
+#undef CONFIG_PM
+
+static void aaci_ac97_select_codec(struct aaci *aaci, struct snd_ac97 *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);
+
+ if (maincr != readl(aaci->base + AACI_MAINCR)) {
+ writel(maincr, aaci->base + AACI_MAINCR);
+ readl(aaci->base + AACI_MAINCR);
+ udelay(1);
+ }
+}
+
+/*
+ * 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(struct snd_ac97 *ac97, unsigned short reg,
+ unsigned short val)
+{
+ struct aaci *aaci = ac97->private_data;
+ int timeout;
+ u32 v;
+
+ if (ac97->num >= 4)
+ return;
+
+ mutex_lock(&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);
+
+ /* Initially, wait one frame period */
+ udelay(FRAME_PERIOD_US);
+
+ /* And then wait an additional eight frame periods for it to be sent */
+ timeout = FRAME_PERIOD_US * 8;
+ do {
+ udelay(1);
+ v = readl(aaci->base + AACI_SLFR);
+ } while ((v & (SLFR_1TXB|SLFR_2TXB)) && --timeout);
+
+ if (v & (SLFR_1TXB|SLFR_2TXB))
+ dev_err(&aaci->dev->dev,
+ "timeout waiting for write to complete\n");
+
+ mutex_unlock(&aaci->ac97_sem);
+}
+
+/*
+ * Read an AC'97 register.
+ */
+static unsigned short aaci_ac97_read(struct snd_ac97 *ac97, unsigned short reg)
+{
+ struct aaci *aaci = ac97->private_data;
+ int timeout, retries = 10;
+ u32 v;
+
+ if (ac97->num >= 4)
+ return ~0;
+
+ mutex_lock(&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);
+
+ /* Initially, wait one frame period */
+ udelay(FRAME_PERIOD_US);
+
+ /* And then wait an additional eight frame periods for it to be sent */
+ timeout = FRAME_PERIOD_US * 8;
+ do {
+ udelay(1);
+ v = readl(aaci->base + AACI_SLFR);
+ } while ((v & SLFR_1TXB) && --timeout);
+
+ if (v & SLFR_1TXB) {
+ dev_err(&aaci->dev->dev, "timeout on slot 1 TX busy\n");
+ v = ~0;
+ goto out;
+ }
+
+ /* Now wait for the response frame */
+ udelay(FRAME_PERIOD_US);
+
+ /* And then wait an additional eight frame periods for data */
+ timeout = FRAME_PERIOD_US * 8;
+ do {
+ udelay(1);
+ cond_resched();
+ v = readl(aaci->base + AACI_SLFR) & (SLFR_1RXV|SLFR_2RXV);
+ } while ((v != (SLFR_1RXV|SLFR_2RXV)) && --timeout);
+
+ if (v != (SLFR_1RXV|SLFR_2RXV)) {
+ dev_err(&aaci->dev->dev, "timeout on RX valid\n");
+ v = ~0;
+ goto out;
+ }
+
+ do {
+ v = readl(aaci->base + AACI_SL1RX) >> 12;
+ if (v == reg) {
+ v = readl(aaci->base + AACI_SL2RX) >> 4;
+ break;
+ } else if (--retries) {
+ dev_warn(&aaci->dev->dev,
+ "ac97 read back fail. retry\n");
+ continue;
+ } else {
+ dev_warn(&aaci->dev->dev,
+ "wrong ac97 register read back (%x != %x)\n",
+ v, reg);
+ v = ~0;
+ }
+ } while (retries);
+ out:
+ mutex_unlock(&aaci->ac97_sem);
+ return v;
+}
+
+static inline void
+aaci_chan_wait_ready(struct aaci_runtime *aacirun, unsigned long mask)
+{
+ u32 val;
+ int timeout = 5000;
+
+ do {
+ udelay(1);
+ val = readl(aacirun->base + AACI_SR);
+ } while (val & mask && timeout--);
+}
+
+
+
+/*
+ * Interrupt support.
+ */
+static void aaci_fifo_irq(struct aaci *aaci, int channel, u32 mask)
+{
+ if (mask & ISR_ORINTR) {
+ dev_warn(&aaci->dev->dev, "RX overrun on chan %d\n", channel);
+ writel(ICLR_RXOEC1 << channel, aaci->base + AACI_INTCLR);
+ }
+
+ if (mask & ISR_RXTOINTR) {
+ dev_warn(&aaci->dev->dev, "RX timeout on chan %d\n", channel);
+ writel(ICLR_RXTOFEC1 << channel, aaci->base + AACI_INTCLR);
+ }
+
+ if (mask & ISR_RXINTR) {
+ struct aaci_runtime *aacirun = &aaci->capture;
+ bool period_elapsed = false;
+ void *ptr;
+
+ if (!aacirun->substream || !aacirun->start) {
+ dev_warn(&aaci->dev->dev, "RX interrupt???\n");
+ writel(0, aacirun->base + AACI_IE);
+ return;
+ }
+
+ spin_lock(&aacirun->lock);
+
+ ptr = aacirun->ptr;
+ do {
+ unsigned int len = aacirun->fifo_bytes;
+ u32 val;
+
+ if (aacirun->bytes <= 0) {
+ aacirun->bytes += aacirun->period;
+ period_elapsed = true;
+ }
+ if (!(aacirun->cr & CR_EN))
+ break;
+
+ val = readl(aacirun->base + AACI_SR);
+ if (!(val & SR_RXHF))
+ break;
+ if (!(val & SR_RXFF))
+ len >>= 1;
+
+ aacirun->bytes -= len;
+
+ /* reading 16 bytes at a time */
+ for( ; len > 0; len -= 16) {
+ asm(
+ "ldmia %1, {r0, r1, r2, r3}\n\t"
+ "stmia %0!, {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;
+
+ spin_unlock(&aacirun->lock);
+
+ if (period_elapsed)
+ snd_pcm_period_elapsed(aacirun->substream);
+ }
+
+ if (mask & ISR_URINTR) {
+ dev_dbg(&aaci->dev->dev, "TX underrun on chan %d\n", channel);
+ writel(ICLR_TXUEC1 << channel, aaci->base + AACI_INTCLR);
+ }
+
+ if (mask & ISR_TXINTR) {
+ struct aaci_runtime *aacirun = &aaci->playback;
+ bool period_elapsed = false;
+ void *ptr;
+
+ if (!aacirun->substream || !aacirun->start) {
+ dev_warn(&aaci->dev->dev, "TX interrupt???\n");
+ writel(0, aacirun->base + AACI_IE);
+ return;
+ }
+
+ spin_lock(&aacirun->lock);
+
+ ptr = aacirun->ptr;
+ do {
+ unsigned int len = aacirun->fifo_bytes;
+ u32 val;
+
+ if (aacirun->bytes <= 0) {
+ aacirun->bytes += aacirun->period;
+ period_elapsed = true;
+ }
+ if (!(aacirun->cr & CR_EN))
+ 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;
+
+ spin_unlock(&aacirun->lock);
+
+ if (period_elapsed)
+ snd_pcm_period_elapsed(aacirun->substream);
+ }
+}
+
+static irqreturn_t aaci_irq(int irq, void *devid)
+{
+ struct aaci *aaci = devid;
+ u32 mask;
+ int i;
+
+ 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, i, m);
+ }
+ }
+ }
+
+ return mask ? IRQ_HANDLED : IRQ_NONE;
+}
+
+
+
+/*
+ * ALSA support.
+ */
+static const struct snd_pcm_hardware 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,
+
+ /* rates are setup from the AC'97 codec */
+ .channels_min = 2,
+ .channels_max = 2,
+ .buffer_bytes_max = 64 * 1024,
+ .period_bytes_min = 256,
+ .period_bytes_max = PAGE_SIZE,
+ .periods_min = 4,
+ .periods_max = PAGE_SIZE / 16,
+};
+
+/*
+ * 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 int aaci_rule_channels(struct snd_pcm_hw_params *p,
+ struct snd_pcm_hw_rule *rule)
+{
+ static const unsigned int channel_list[] = { 2, 4, 6 };
+ struct aaci *aaci = rule->private;
+ unsigned int 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)) {
+ mask |= 1 << 1;
+ if (slots & (1 << AC97_SLOT_LFE))
+ mask |= 1 << 2;
+ }
+
+ return snd_interval_list(hw_param_interval(p, rule->var),
+ ARRAY_SIZE(channel_list), channel_list, mask);
+}
+
+static int aaci_pcm_open(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct aaci *aaci = substream->private_data;
+ struct aaci_runtime *aacirun;
+ int ret = 0;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ aacirun = &aaci->playback;
+ } else {
+ aacirun = &aaci->capture;
+ }
+
+ aacirun->substream = substream;
+ runtime->private_data = aacirun;
+ runtime->hw = aaci_hw_info;
+ runtime->hw.rates = aacirun->pcm->rates;
+ snd_pcm_limit_hw_rates(runtime);
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ runtime->hw.channels_max = 6;
+
+ /* 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;
+
+ if (aacirun->pcm->r[1].slots)
+ snd_ac97_pcm_double_rate_rules(runtime);
+ }
+
+ /*
+ * ALSA wants the byte-size of the FIFOs. As we only support
+ * 16-bit samples, this is twice the FIFO depth irrespective
+ * of whether it's in compact mode or not.
+ */
+ runtime->hw.fifo_size = aaci->fifo_depth * 2;
+
+ mutex_lock(&aaci->irq_lock);
+ if (!aaci->users++) {
+ ret = request_irq(aaci->dev->irq[0], aaci_irq,
+ IRQF_SHARED, DRIVER_NAME, aaci);
+ if (ret != 0)
+ aaci->users--;
+ }
+ mutex_unlock(&aaci->irq_lock);
+
+ return ret;
+}
+
+
+/*
+ * Common ALSA stuff
+ */
+static int aaci_pcm_close(struct snd_pcm_substream *substream)
+{
+ struct aaci *aaci = substream->private_data;
+ struct aaci_runtime *aacirun = substream->runtime->private_data;
+
+ WARN_ON(aacirun->cr & CR_EN);
+
+ aacirun->substream = NULL;
+
+ mutex_lock(&aaci->irq_lock);
+ if (!--aaci->users)
+ free_irq(aaci->dev->irq[0], aaci);
+ mutex_unlock(&aaci->irq_lock);
+
+ return 0;
+}
+
+static int aaci_pcm_hw_free(struct snd_pcm_substream *substream)
+{
+ struct aaci_runtime *aacirun = substream->runtime->private_data;
+
+ /*
+ * This must not be called with the device enabled.
+ */
+ WARN_ON(aacirun->cr & CR_EN);
+
+ if (aacirun->pcm_open)
+ snd_ac97_pcm_close(aacirun->pcm);
+ aacirun->pcm_open = 0;
+
+ return 0;
+}
+
+/* Channel to slot mask */
+static const u32 channels_to_slotmask[] = {
+ [2] = CR_SL3 | CR_SL4,
+ [4] = CR_SL3 | CR_SL4 | CR_SL7 | CR_SL8,
+ [6] = CR_SL3 | CR_SL4 | CR_SL7 | CR_SL8 | CR_SL6 | CR_SL9,
+};
+
+static int aaci_pcm_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params)
+{
+ struct aaci_runtime *aacirun = substream->runtime->private_data;
+ struct aaci *aaci = substream->private_data;
+ unsigned int channels = params_channels(params);
+ unsigned int rate = params_rate(params);
+ int dbl = rate > 48000;
+ int err;
+
+ aaci_pcm_hw_free(substream);
+ if (aacirun->pcm_open) {
+ snd_ac97_pcm_close(aacirun->pcm);
+ aacirun->pcm_open = 0;
+ }
+
+ /* channels is already limited to 2, 4, or 6 by aaci_rule_channels */
+ if (dbl && channels != 2)
+ return -EINVAL;
+
+ err = snd_ac97_pcm_open(aacirun->pcm, rate, channels,
+ aacirun->pcm->r[dbl].slots);
+
+ aacirun->pcm_open = err == 0;
+ aacirun->cr = CR_FEN | CR_COMPACT | CR_SZ16;
+ aacirun->cr |= channels_to_slotmask[channels + dbl * 2];
+
+ /*
+ * fifo_bytes is the number of bytes we transfer to/from
+ * the FIFO, including padding. So that's x4. As we're
+ * in compact mode, the FIFO is half the size.
+ */
+ aacirun->fifo_bytes = aaci->fifo_depth * 4 / 2;
+
+ return err;
+}
+
+static int aaci_pcm_prepare(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct aaci_runtime *aacirun = runtime->private_data;
+
+ aacirun->period = snd_pcm_lib_period_bytes(substream);
+ aacirun->start = runtime->dma_area;
+ aacirun->end = aacirun->start + snd_pcm_lib_buffer_bytes(substream);
+ aacirun->ptr = aacirun->start;
+ aacirun->bytes = aacirun->period;
+
+ return 0;
+}
+
+static snd_pcm_uframes_t aaci_pcm_pointer(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct aaci_runtime *aacirun = runtime->private_data;
+ ssize_t bytes = aacirun->ptr - aacirun->start;
+
+ return bytes_to_frames(runtime, bytes);
+}
+
+
+/*
+ * Playback specific ALSA stuff
+ */
+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 &= ~CR_EN;
+ aaci_chan_wait_ready(aacirun, SR_TXB);
+ writel(aacirun->cr, aacirun->base + AACI_TXCR);
+}
+
+static void aaci_pcm_playback_start(struct aaci_runtime *aacirun)
+{
+ u32 ie;
+
+ aaci_chan_wait_ready(aacirun, SR_TXB);
+ aacirun->cr |= CR_EN;
+
+ 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(struct snd_pcm_substream *substream, int cmd)
+{
+ struct aaci_runtime *aacirun = substream->runtime->private_data;
+ unsigned long flags;
+ int ret = 0;
+
+ spin_lock_irqsave(&aacirun->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(&aacirun->lock, flags);
+
+ return ret;
+}
+
+static const struct snd_pcm_ops aaci_playback_ops = {
+ .open = aaci_pcm_open,
+ .close = aaci_pcm_close,
+ .hw_params = aaci_pcm_hw_params,
+ .hw_free = aaci_pcm_hw_free,
+ .prepare = aaci_pcm_prepare,
+ .trigger = aaci_pcm_playback_trigger,
+ .pointer = aaci_pcm_pointer,
+};
+
+static void aaci_pcm_capture_stop(struct aaci_runtime *aacirun)
+{
+ u32 ie;
+
+ aaci_chan_wait_ready(aacirun, SR_RXB);
+
+ ie = readl(aacirun->base + AACI_IE);
+ ie &= ~(IE_ORIE | IE_RXIE);
+ writel(ie, aacirun->base+AACI_IE);
+
+ aacirun->cr &= ~CR_EN;
+
+ writel(aacirun->cr, aacirun->base + AACI_RXCR);
+}
+
+static void aaci_pcm_capture_start(struct aaci_runtime *aacirun)
+{
+ u32 ie;
+
+ aaci_chan_wait_ready(aacirun, SR_RXB);
+
+#ifdef DEBUG
+ /* RX Timeout value: bits 28:17 in RXCR */
+ aacirun->cr |= 0xf << 17;
+#endif
+
+ aacirun->cr |= CR_EN;
+ writel(aacirun->cr, aacirun->base + AACI_RXCR);
+
+ ie = readl(aacirun->base + AACI_IE);
+ ie |= IE_ORIE |IE_RXIE; // overrun and rx interrupt -- half full
+ writel(ie, aacirun->base + AACI_IE);
+}
+
+static int aaci_pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd)
+{
+ struct aaci_runtime *aacirun = substream->runtime->private_data;
+ unsigned long flags;
+ int ret = 0;
+
+ spin_lock_irqsave(&aacirun->lock, flags);
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ aaci_pcm_capture_start(aacirun);
+ break;
+
+ case SNDRV_PCM_TRIGGER_RESUME:
+ aaci_pcm_capture_start(aacirun);
+ break;
+
+ case SNDRV_PCM_TRIGGER_STOP:
+ aaci_pcm_capture_stop(aacirun);
+ break;
+
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ aaci_pcm_capture_stop(aacirun);
+ break;
+
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ break;
+
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ break;
+
+ default:
+ ret = -EINVAL;
+ }
+
+ spin_unlock_irqrestore(&aacirun->lock, flags);
+
+ return ret;
+}
+
+static int aaci_pcm_capture_prepare(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct aaci *aaci = substream->private_data;
+
+ aaci_pcm_prepare(substream);
+
+ /* allow changing of sample rate */
+ aaci_ac97_write(aaci->ac97, AC97_EXTENDED_STATUS, 0x0001); /* VRA */
+ aaci_ac97_write(aaci->ac97, AC97_PCM_LR_ADC_RATE, runtime->rate);
+ aaci_ac97_write(aaci->ac97, AC97_PCM_MIC_ADC_RATE, runtime->rate);
+
+ /* Record select: Mic: 0, Aux: 3, Line: 4 */
+ aaci_ac97_write(aaci->ac97, AC97_REC_SEL, 0x0404);
+
+ return 0;
+}
+
+static const struct snd_pcm_ops aaci_capture_ops = {
+ .open = aaci_pcm_open,
+ .close = aaci_pcm_close,
+ .hw_params = aaci_pcm_hw_params,
+ .hw_free = aaci_pcm_hw_free,
+ .prepare = aaci_pcm_capture_prepare,
+ .trigger = aaci_pcm_capture_trigger,
+ .pointer = aaci_pcm_pointer,
+};
+
+/*
+ * Power Management.
+ */
+#ifdef CONFIG_PM
+static int aaci_do_suspend(struct snd_card *card)
+{
+ struct aaci *aaci = card->private_data;
+ snd_power_change_state(card, SNDRV_CTL_POWER_D3cold);
+ return 0;
+}
+
+static int aaci_do_resume(struct snd_card *card)
+{
+ snd_power_change_state(card, SNDRV_CTL_POWER_D0);
+ return 0;
+}
+
+static int aaci_suspend(struct device *dev)
+{
+ struct snd_card *card = dev_get_drvdata(dev);
+ return card ? aaci_do_suspend(card) : 0;
+}
+
+static int aaci_resume(struct device *dev)
+{
+ struct snd_card *card = dev_get_drvdata(dev);
+ return card ? aaci_do_resume(card) : 0;
+}
+
+static SIMPLE_DEV_PM_OPS(aaci_dev_pm_ops, aaci_suspend, aaci_resume);
+#define AACI_DEV_PM_OPS (&aaci_dev_pm_ops)
+#else
+#define AACI_DEV_PM_OPS NULL
+#endif
+
+
+static const struct ac97_pcm ac97_defs[] = {
+ [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] = {
+ .slots = (1 << AC97_SLOT_PCM_LEFT) |
+ (1 << AC97_SLOT_PCM_RIGHT) |
+ (1 << AC97_SLOT_PCM_LEFT_0) |
+ (1 << AC97_SLOT_PCM_RIGHT_0),
+ },
+ },
+ },
+ [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 const struct snd_ac97_bus_ops aaci_bus_ops = {
+ .write = aaci_ac97_write,
+ .read = aaci_ac97_read,
+};
+
+static int aaci_probe_ac97(struct aaci *aaci)
+{
+ struct snd_ac97_template ac97_template;
+ struct snd_ac97_bus *ac97_bus;
+ struct snd_ac97 *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(FRAME_PERIOD_US * 2);
+
+ 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(struct snd_ac97_template));
+ 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;
+ aaci->ac97 = ac97;
+
+ /*
+ * 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];
+ aaci->capture.pcm = &ac97_bus->pcms[1];
+
+ out:
+ return ret;
+}
+
+static void aaci_free_card(struct snd_card *card)
+{
+ struct aaci *aaci = card->private_data;
+
+ iounmap(aaci->base);
+}
+
+static struct aaci *aaci_init_card(struct amba_device *dev)
+{
+ struct aaci *aaci;
+ struct snd_card *card;
+ int err;
+
+ err = snd_card_new(&dev->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
+ THIS_MODULE, sizeof(struct aaci), &card);
+ if (err < 0)
+ return NULL;
+
+ card->private_free = aaci_free_card;
+
+ strscpy(card->driver, DRIVER_NAME, sizeof(card->driver));
+ strscpy(card->shortname, "ARM AC'97 Interface", sizeof(card->shortname));
+ snprintf(card->longname, sizeof(card->longname),
+ "%s PL%03x rev%u at 0x%08llx, irq %d",
+ card->shortname, amba_part(dev), amba_rev(dev),
+ (unsigned long long)dev->res.start, dev->irq[0]);
+
+ aaci = card->private_data;
+ mutex_init(&aaci->ac97_sem);
+ mutex_init(&aaci->irq_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 aaci_init_pcm(struct aaci *aaci)
+{
+ struct snd_pcm *pcm;
+ int ret;
+
+ ret = snd_pcm_new(aaci->card, "AACI AC'97", 0, 1, 1, &pcm);
+ if (ret == 0) {
+ aaci->pcm = pcm;
+ pcm->private_data = aaci;
+ pcm->info_flags = 0;
+
+ strscpy(pcm->name, DRIVER_NAME, sizeof(pcm->name));
+
+ snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &aaci_playback_ops);
+ snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &aaci_capture_ops);
+ snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV,
+ aaci->card->dev,
+ 0, 64 * 1024);
+ }
+
+ return ret;
+}
+
+static unsigned int aaci_size_fifo(struct aaci *aaci)
+{
+ struct aaci_runtime *aacirun = &aaci->playback;
+ int i;
+
+ /*
+ * Enable the channel, but don't assign it to any slots, so
+ * it won't empty onto the AC'97 link.
+ */
+ writel(CR_FEN | CR_SZ16 | CR_EN, aacirun->base + AACI_TXCR);
+
+ for (i = 0; !(readl(aacirun->base + AACI_SR) & SR_TXFF) && i < 4096; i++)
+ writel(0, aacirun->fifo);
+
+ writel(0, aacirun->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);
+ readl(aaci->base + AACI_MAINCR);
+ udelay(1);
+ writel(aaci->maincr, aaci->base + AACI_MAINCR);
+
+ /*
+ * If we hit 4096 entries, we failed. Go back to the specified
+ * fifo depth.
+ */
+ if (i == 4096)
+ i = 8;
+
+ return i;
+}
+
+static int aaci_probe(struct amba_device *dev,
+ const struct amba_id *id)
+{
+ struct aaci *aaci;
+ int ret, i;
+
+ ret = amba_request_regions(dev, NULL);
+ if (ret)
+ return ret;
+
+ aaci = aaci_init_card(dev);
+ if (!aaci) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ aaci->base = ioremap(dev->res.start, resource_size(&dev->res));
+ if (!aaci->base) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ /*
+ * Playback uses AACI channel 0
+ */
+ spin_lock_init(&aaci->playback.lock);
+ aaci->playback.base = aaci->base + AACI_CSCH1;
+ aaci->playback.fifo = aaci->base + AACI_DR1;
+
+ /*
+ * Capture uses AACI channel 0
+ */
+ spin_lock_init(&aaci->capture.lock);
+ aaci->capture.base = aaci->base + AACI_CSCH1;
+ aaci->capture.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);
+ /*
+ * Fix: ac97 read back fail errors by reading
+ * from any arbitrary aaci register.
+ */
+ readl(aaci->base + AACI_CSCH1);
+ ret = aaci_probe_ac97(aaci);
+ if (ret)
+ goto out;
+
+ /*
+ * Size the FIFOs (must be multiple of 16).
+ * This is the number of entries in the FIFO.
+ */
+ aaci->fifo_depth = aaci_size_fifo(aaci);
+ if (aaci->fifo_depth & 15) {
+ printk(KERN_WARNING "AACI: FIFO depth %d not supported\n",
+ aaci->fifo_depth);
+ ret = -ENODEV;
+ goto out;
+ }
+
+ ret = aaci_init_pcm(aaci);
+ if (ret)
+ goto out;
+
+ ret = snd_card_register(aaci->card);
+ if (ret == 0) {
+ dev_info(&dev->dev, "%s\n", aaci->card->longname);
+ dev_info(&dev->dev, "FIFO %u entries\n", aaci->fifo_depth);
+ amba_set_drvdata(dev, aaci->card);
+ return ret;
+ }
+
+ out:
+ if (aaci)
+ snd_card_free(aaci->card);
+ amba_release_regions(dev);
+ return ret;
+}
+
+static void aaci_remove(struct amba_device *dev)
+{
+ struct snd_card *card = amba_get_drvdata(dev);
+
+ if (card) {
+ struct aaci *aaci = card->private_data;
+ writel(0, aaci->base + AACI_MAINCR);
+
+ snd_card_free(card);
+ amba_release_regions(dev);
+ }
+}
+
+static struct amba_id aaci_ids[] = {
+ {
+ .id = 0x00041041,
+ .mask = 0x000fffff,
+ },
+ { 0, 0 },
+};
+
+MODULE_DEVICE_TABLE(amba, aaci_ids);
+
+static struct amba_driver aaci_driver = {
+ .drv = {
+ .name = DRIVER_NAME,
+ .pm = AACI_DEV_PM_OPS,
+ },
+ .probe = aaci_probe,
+ .remove = aaci_remove,
+ .id_table = aaci_ids,
+};
+
+module_amba_driver(aaci_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("ARM PrimeCell PL041 Advanced Audio CODEC Interface driver");
diff --git a/sound/arm/aaci.h b/sound/arm/aaci.h
new file mode 100644
index 000000000..18680e7f8
--- /dev/null
+++ b/sound/arm/aaci.h
@@ -0,0 +1,247 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * linux/sound/arm/aaci.c - ARM PrimeCell AACI PL041 driver
+ *
+ * Copyright (C) 2003 Deep Blue Solutions, Ltd, All Rights Reserved.
+ */
+#ifndef AACI_H
+#define AACI_H
+
+/*
+ * Control and status register offsets
+ * P39.
+ */
+#define AACI_CSCH1 0x000
+#define AACI_CSCH2 0x014
+#define AACI_CSCH3 0x028
+#define AACI_CSCH4 0x03c
+
+#define AACI_RXCR 0x000 /* 29 bits Control Rx FIFO */
+#define AACI_TXCR 0x004 /* 17 bits Control Tx FIFO */
+#define AACI_SR 0x008 /* 12 bits Status */
+#define AACI_ISR 0x00c /* 7 bits Int Status */
+#define AACI_IE 0x010 /* 7 bits Int Enable */
+
+/*
+ * Other registers
+ */
+#define AACI_SL1RX 0x050
+#define AACI_SL1TX 0x054
+#define AACI_SL2RX 0x058
+#define AACI_SL2TX 0x05c
+#define AACI_SL12RX 0x060
+#define AACI_SL12TX 0x064
+#define AACI_SLFR 0x068 /* slot flags */
+#define AACI_SLISTAT 0x06c /* slot interrupt status */
+#define AACI_SLIEN 0x070 /* slot interrupt enable */
+#define AACI_INTCLR 0x074 /* interrupt clear */
+#define AACI_MAINCR 0x078 /* main control */
+#define AACI_RESET 0x07c /* reset control */
+#define AACI_SYNC 0x080 /* sync control */
+#define AACI_ALLINTS 0x084 /* all fifo interrupt status */
+#define AACI_MAINFR 0x088 /* main flag register */
+#define AACI_DR1 0x090 /* data read/written fifo 1 */
+#define AACI_DR2 0x0b0 /* data read/written fifo 2 */
+#define AACI_DR3 0x0d0 /* data read/written fifo 3 */
+#define AACI_DR4 0x0f0 /* data read/written fifo 4 */
+
+/*
+ * TX/RX fifo control register (CR). P48
+ */
+#define CR_FEN (1 << 16) /* fifo enable */
+#define CR_COMPACT (1 << 15) /* compact mode */
+#define CR_SZ16 (0 << 13) /* 16 bits */
+#define CR_SZ18 (1 << 13) /* 18 bits */
+#define CR_SZ20 (2 << 13) /* 20 bits */
+#define CR_SZ12 (3 << 13) /* 12 bits */
+#define CR_SL12 (1 << 12)
+#define CR_SL11 (1 << 11)
+#define CR_SL10 (1 << 10)
+#define CR_SL9 (1 << 9)
+#define CR_SL8 (1 << 8)
+#define CR_SL7 (1 << 7)
+#define CR_SL6 (1 << 6)
+#define CR_SL5 (1 << 5)
+#define CR_SL4 (1 << 4)
+#define CR_SL3 (1 << 3)
+#define CR_SL2 (1 << 2)
+#define CR_SL1 (1 << 1)
+#define CR_EN (1 << 0) /* transmit enable */
+
+/*
+ * status register bits. P49
+ */
+#define SR_RXTOFE (1 << 11) /* rx timeout fifo empty */
+#define SR_TXTO (1 << 10) /* rx timeout fifo nonempty */
+#define SR_TXU (1 << 9) /* tx underrun */
+#define SR_RXO (1 << 8) /* rx overrun */
+#define SR_TXB (1 << 7) /* tx busy */
+#define SR_RXB (1 << 6) /* rx busy */
+#define SR_TXFF (1 << 5) /* tx fifo full */
+#define SR_RXFF (1 << 4) /* rx fifo full */
+#define SR_TXHE (1 << 3) /* tx fifo half empty */
+#define SR_RXHF (1 << 2) /* rx fifo half full */
+#define SR_TXFE (1 << 1) /* tx fifo empty */
+#define SR_RXFE (1 << 0) /* rx fifo empty */
+
+/*
+ * interrupt status register bits.
+ */
+#define ISR_RXTOFEINTR (1 << 6) /* rx fifo empty */
+#define ISR_URINTR (1 << 5) /* tx underflow */
+#define ISR_ORINTR (1 << 4) /* rx overflow */
+#define ISR_RXINTR (1 << 3) /* rx fifo */
+#define ISR_TXINTR (1 << 2) /* tx fifo intr */
+#define ISR_RXTOINTR (1 << 1) /* tx timeout */
+#define ISR_TXCINTR (1 << 0) /* tx complete */
+
+/*
+ * interrupt enable register bits.
+ */
+#define IE_RXTOIE (1 << 6)
+#define IE_URIE (1 << 5)
+#define IE_ORIE (1 << 4)
+#define IE_RXIE (1 << 3)
+#define IE_TXIE (1 << 2)
+#define IE_RXTIE (1 << 1)
+#define IE_TXCIE (1 << 0)
+
+/*
+ * interrupt status. P51
+ */
+#define ISR_RXTOFE (1 << 6) /* rx timeout fifo empty */
+#define ISR_UR (1 << 5) /* tx fifo underrun */
+#define ISR_OR (1 << 4) /* rx fifo overrun */
+#define ISR_RX (1 << 3) /* rx interrupt status */
+#define ISR_TX (1 << 2) /* tx interrupt status */
+#define ISR_RXTO (1 << 1) /* rx timeout */
+#define ISR_TXC (1 << 0) /* tx complete */
+
+/*
+ * interrupt enable. P52
+ */
+#define IE_RXTOFE (1 << 6) /* rx timeout fifo empty */
+#define IE_UR (1 << 5) /* tx fifo underrun */
+#define IE_OR (1 << 4) /* rx fifo overrun */
+#define IE_RX (1 << 3) /* rx interrupt status */
+#define IE_TX (1 << 2) /* tx interrupt status */
+#define IE_RXTO (1 << 1) /* rx timeout */
+#define IE_TXC (1 << 0) /* tx complete */
+
+/*
+ * slot flag register bits. P56
+ */
+#define SLFR_RWIS (1 << 13) /* raw wake-up interrupt status */
+#define SLFR_RGPIOINTR (1 << 12) /* raw gpio interrupt */
+#define SLFR_12TXE (1 << 11) /* slot 12 tx empty */
+#define SLFR_12RXV (1 << 10) /* slot 12 rx valid */
+#define SLFR_2TXE (1 << 9) /* slot 2 tx empty */
+#define SLFR_2RXV (1 << 8) /* slot 2 rx valid */
+#define SLFR_1TXE (1 << 7) /* slot 1 tx empty */
+#define SLFR_1RXV (1 << 6) /* slot 1 rx valid */
+#define SLFR_12TXB (1 << 5) /* slot 12 tx busy */
+#define SLFR_12RXB (1 << 4) /* slot 12 rx busy */
+#define SLFR_2TXB (1 << 3) /* slot 2 tx busy */
+#define SLFR_2RXB (1 << 2) /* slot 2 rx busy */
+#define SLFR_1TXB (1 << 1) /* slot 1 tx busy */
+#define SLFR_1RXB (1 << 0) /* slot 1 rx busy */
+
+/*
+ * Interrupt clear register.
+ */
+#define ICLR_RXTOFEC4 (1 << 12)
+#define ICLR_RXTOFEC3 (1 << 11)
+#define ICLR_RXTOFEC2 (1 << 10)
+#define ICLR_RXTOFEC1 (1 << 9)
+#define ICLR_TXUEC4 (1 << 8)
+#define ICLR_TXUEC3 (1 << 7)
+#define ICLR_TXUEC2 (1 << 6)
+#define ICLR_TXUEC1 (1 << 5)
+#define ICLR_RXOEC4 (1 << 4)
+#define ICLR_RXOEC3 (1 << 3)
+#define ICLR_RXOEC2 (1 << 2)
+#define ICLR_RXOEC1 (1 << 1)
+#define ICLR_WISC (1 << 0)
+
+/*
+ * Main control register bits. P62
+ */
+#define MAINCR_SCRA(x) ((x) << 10) /* secondary codec reg access */
+#define MAINCR_DMAEN (1 << 9) /* dma enable */
+#define MAINCR_SL12TXEN (1 << 8) /* slot 12 transmit enable */
+#define MAINCR_SL12RXEN (1 << 7) /* slot 12 receive enable */
+#define MAINCR_SL2TXEN (1 << 6) /* slot 2 transmit enable */
+#define MAINCR_SL2RXEN (1 << 5) /* slot 2 receive enable */
+#define MAINCR_SL1TXEN (1 << 4) /* slot 1 transmit enable */
+#define MAINCR_SL1RXEN (1 << 3) /* slot 1 receive enable */
+#define MAINCR_LPM (1 << 2) /* low power mode */
+#define MAINCR_LOOPBK (1 << 1) /* loopback */
+#define MAINCR_IE (1 << 0) /* aaci interface enable */
+
+/*
+ * Reset register bits. P65
+ */
+#define RESET_NRST (1 << 0)
+
+/*
+ * Sync register bits. P65
+ */
+#define SYNC_FORCE (1 << 0)
+
+/*
+ * Main flag register bits. P66
+ */
+#define MAINFR_TXB (1 << 1) /* transmit busy */
+#define MAINFR_RXB (1 << 0) /* receive busy */
+
+
+
+struct aaci_runtime {
+ void __iomem *base;
+ void __iomem *fifo;
+ spinlock_t lock;
+
+ struct ac97_pcm *pcm;
+ int pcm_open;
+
+ u32 cr;
+ struct snd_pcm_substream *substream;
+
+ unsigned int period; /* byte size of a "period" */
+
+ /*
+ * PIO support
+ */
+ void *start;
+ void *end;
+ void *ptr;
+ int bytes;
+ unsigned int fifo_bytes;
+};
+
+struct aaci {
+ struct amba_device *dev;
+ struct snd_card *card;
+ void __iomem *base;
+ unsigned int fifo_depth;
+ unsigned int users;
+ struct mutex irq_lock;
+
+ /* AC'97 */
+ struct mutex ac97_sem;
+ struct snd_ac97_bus *ac97_bus;
+ struct snd_ac97 *ac97;
+
+ u32 maincr;
+
+ struct aaci_runtime playback;
+ struct aaci_runtime capture;
+
+ struct snd_pcm *pcm;
+};
+
+#define ACSTREAM_FRONT 0
+#define ACSTREAM_SURROUND 1
+#define ACSTREAM_LFE 2
+
+#endif
diff --git a/sound/arm/pxa2xx-ac97-lib.c b/sound/arm/pxa2xx-ac97-lib.c
new file mode 100644
index 000000000..2ca33fd5a
--- /dev/null
+++ b/sound/arm/pxa2xx-ac97-lib.c
@@ -0,0 +1,468 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Based on sound/arm/pxa2xx-ac97.c and sound/soc/pxa/pxa2xx-ac97.c
+ * which contain:
+ *
+ * Author: Nicolas Pitre
+ * Created: Dec 02, 2004
+ * Copyright: MontaVista Software Inc.
+ */
+
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/io.h>
+#include <linux/gpio.h>
+#include <linux/of_gpio.h>
+#include <linux/soc/pxa/cpu.h>
+
+#include <sound/pxa2xx-lib.h>
+
+#include <linux/platform_data/asoc-pxa.h>
+
+#include "pxa2xx-ac97-regs.h"
+
+static DEFINE_MUTEX(car_mutex);
+static DECLARE_WAIT_QUEUE_HEAD(gsr_wq);
+static volatile long gsr_bits;
+static struct clk *ac97_clk;
+static struct clk *ac97conf_clk;
+static int reset_gpio;
+static void __iomem *ac97_reg_base;
+
+extern void pxa27x_configure_ac97reset(int reset_gpio, bool to_gpio);
+
+/*
+ * Beware PXA27x bugs:
+ *
+ * o Slot 12 read from modem space will hang controller.
+ * o CDONE, SDONE interrupt fails after any slot 12 IO.
+ *
+ * We therefore have an hybrid approach for waiting on SDONE (interrupt or
+ * 1 jiffy timeout if interrupt never comes).
+ */
+
+int pxa2xx_ac97_read(int slot, unsigned short reg)
+{
+ int val = -ENODEV;
+ u32 __iomem *reg_addr;
+
+ if (slot > 0)
+ return -ENODEV;
+
+ mutex_lock(&car_mutex);
+
+ /* set up primary or secondary codec space */
+ if (cpu_is_pxa25x() && reg == AC97_GPIO_STATUS)
+ reg_addr = ac97_reg_base +
+ (slot ? SMC_REG_BASE : PMC_REG_BASE);
+ else
+ reg_addr = ac97_reg_base +
+ (slot ? SAC_REG_BASE : PAC_REG_BASE);
+ reg_addr += (reg >> 1);
+
+ /* start read access across the ac97 link */
+ writel(GSR_CDONE | GSR_SDONE, ac97_reg_base + GSR);
+ gsr_bits = 0;
+ val = (readl(reg_addr) & 0xffff);
+ if (reg == AC97_GPIO_STATUS)
+ goto out;
+ if (wait_event_timeout(gsr_wq, (readl(ac97_reg_base + GSR) | gsr_bits) & GSR_SDONE, 1) <= 0 &&
+ !((readl(ac97_reg_base + GSR) | gsr_bits) & GSR_SDONE)) {
+ printk(KERN_ERR "%s: read error (ac97_reg=%d GSR=%#lx)\n",
+ __func__, reg, readl(ac97_reg_base + GSR) | gsr_bits);
+ val = -ETIMEDOUT;
+ goto out;
+ }
+
+ /* valid data now */
+ writel(GSR_CDONE | GSR_SDONE, ac97_reg_base + GSR);
+ gsr_bits = 0;
+ val = (readl(reg_addr) & 0xffff);
+ /* but we've just started another cycle... */
+ wait_event_timeout(gsr_wq, (readl(ac97_reg_base + GSR) | gsr_bits) & GSR_SDONE, 1);
+
+out: mutex_unlock(&car_mutex);
+ return val;
+}
+EXPORT_SYMBOL_GPL(pxa2xx_ac97_read);
+
+int pxa2xx_ac97_write(int slot, unsigned short reg, unsigned short val)
+{
+ u32 __iomem *reg_addr;
+ int ret = 0;
+
+ mutex_lock(&car_mutex);
+
+ /* set up primary or secondary codec space */
+ if (cpu_is_pxa25x() && reg == AC97_GPIO_STATUS)
+ reg_addr = ac97_reg_base +
+ (slot ? SMC_REG_BASE : PMC_REG_BASE);
+ else
+ reg_addr = ac97_reg_base +
+ (slot ? SAC_REG_BASE : PAC_REG_BASE);
+ reg_addr += (reg >> 1);
+
+ writel(GSR_CDONE | GSR_SDONE, ac97_reg_base + GSR);
+ gsr_bits = 0;
+ writel(val, reg_addr);
+ if (wait_event_timeout(gsr_wq, (readl(ac97_reg_base + GSR) | gsr_bits) & GSR_CDONE, 1) <= 0 &&
+ !((readl(ac97_reg_base + GSR) | gsr_bits) & GSR_CDONE)) {
+ printk(KERN_ERR "%s: write error (ac97_reg=%d GSR=%#lx)\n",
+ __func__, reg, readl(ac97_reg_base + GSR) | gsr_bits);
+ ret = -EIO;
+ }
+
+ mutex_unlock(&car_mutex);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(pxa2xx_ac97_write);
+
+#ifdef CONFIG_PXA25x
+static inline void pxa_ac97_warm_pxa25x(void)
+{
+ gsr_bits = 0;
+
+ writel(readl(ac97_reg_base + GCR) | (GCR_WARM_RST), ac97_reg_base + GCR);
+}
+
+static inline void pxa_ac97_cold_pxa25x(void)
+{
+ writel(readl(ac97_reg_base + GCR) & ( GCR_COLD_RST), ac97_reg_base + GCR); /* clear everything but nCRST */
+ writel(readl(ac97_reg_base + GCR) & (~GCR_COLD_RST), ac97_reg_base + GCR); /* then assert nCRST */
+
+ gsr_bits = 0;
+
+ writel(GCR_COLD_RST, ac97_reg_base + GCR);
+}
+#endif
+
+#ifdef CONFIG_PXA27x
+static inline void pxa_ac97_warm_pxa27x(void)
+{
+ gsr_bits = 0;
+
+ /* warm reset broken on Bulverde, so manually keep AC97 reset high */
+ pxa27x_configure_ac97reset(reset_gpio, true);
+ udelay(10);
+ writel(readl(ac97_reg_base + GCR) | (GCR_WARM_RST), ac97_reg_base + GCR);
+ pxa27x_configure_ac97reset(reset_gpio, false);
+ udelay(500);
+}
+
+static inline void pxa_ac97_cold_pxa27x(void)
+{
+ writel(readl(ac97_reg_base + GCR) & ( GCR_COLD_RST), ac97_reg_base + GCR); /* clear everything but nCRST */
+ writel(readl(ac97_reg_base + GCR) & (~GCR_COLD_RST), ac97_reg_base + GCR); /* then assert nCRST */
+
+ gsr_bits = 0;
+
+ /* PXA27x Developers Manual section 13.5.2.2.1 */
+ clk_prepare_enable(ac97conf_clk);
+ udelay(5);
+ clk_disable_unprepare(ac97conf_clk);
+ writel(GCR_COLD_RST | GCR_WARM_RST, ac97_reg_base + GCR);
+}
+#endif
+
+#ifdef CONFIG_PXA3xx
+static inline void pxa_ac97_warm_pxa3xx(void)
+{
+ gsr_bits = 0;
+
+ /* Can't use interrupts */
+ writel(readl(ac97_reg_base + GCR) | (GCR_WARM_RST), ac97_reg_base + GCR);
+}
+
+static inline void pxa_ac97_cold_pxa3xx(void)
+{
+ /* Hold CLKBPB for 100us */
+ writel(0, ac97_reg_base + GCR);
+ writel(GCR_CLKBPB, ac97_reg_base + GCR);
+ udelay(100);
+ writel(0, ac97_reg_base + GCR);
+
+ writel(readl(ac97_reg_base + GCR) & ( GCR_COLD_RST), ac97_reg_base + GCR); /* clear everything but nCRST */
+ writel(readl(ac97_reg_base + GCR) & (~GCR_COLD_RST), ac97_reg_base + GCR); /* then assert nCRST */
+
+ gsr_bits = 0;
+
+ /* Can't use interrupts on PXA3xx */
+ writel(readl(ac97_reg_base + GCR) & (~(GCR_PRIRDY_IEN|GCR_SECRDY_IEN)), ac97_reg_base + GCR);
+
+ writel(GCR_WARM_RST | GCR_COLD_RST, ac97_reg_base + GCR);
+}
+#endif
+
+bool pxa2xx_ac97_try_warm_reset(void)
+{
+ unsigned long gsr;
+ unsigned int timeout = 100;
+
+#ifdef CONFIG_PXA25x
+ if (cpu_is_pxa25x())
+ pxa_ac97_warm_pxa25x();
+ else
+#endif
+#ifdef CONFIG_PXA27x
+ if (cpu_is_pxa27x())
+ pxa_ac97_warm_pxa27x();
+ else
+#endif
+#ifdef CONFIG_PXA3xx
+ if (cpu_is_pxa3xx())
+ pxa_ac97_warm_pxa3xx();
+ else
+#endif
+ snd_BUG();
+
+ while (!((readl(ac97_reg_base + GSR) | gsr_bits) & (GSR_PCR | GSR_SCR)) && timeout--)
+ mdelay(1);
+
+ gsr = readl(ac97_reg_base + GSR) | gsr_bits;
+ if (!(gsr & (GSR_PCR | GSR_SCR))) {
+ printk(KERN_INFO "%s: warm reset timeout (GSR=%#lx)\n",
+ __func__, gsr);
+
+ return false;
+ }
+
+ return true;
+}
+EXPORT_SYMBOL_GPL(pxa2xx_ac97_try_warm_reset);
+
+bool pxa2xx_ac97_try_cold_reset(void)
+{
+ unsigned long gsr;
+ unsigned int timeout = 1000;
+
+#ifdef CONFIG_PXA25x
+ if (cpu_is_pxa25x())
+ pxa_ac97_cold_pxa25x();
+ else
+#endif
+#ifdef CONFIG_PXA27x
+ if (cpu_is_pxa27x())
+ pxa_ac97_cold_pxa27x();
+ else
+#endif
+#ifdef CONFIG_PXA3xx
+ if (cpu_is_pxa3xx())
+ pxa_ac97_cold_pxa3xx();
+ else
+#endif
+ snd_BUG();
+
+ while (!((readl(ac97_reg_base + GSR) | gsr_bits) & (GSR_PCR | GSR_SCR)) && timeout--)
+ mdelay(1);
+
+ gsr = readl(ac97_reg_base + GSR) | gsr_bits;
+ if (!(gsr & (GSR_PCR | GSR_SCR))) {
+ printk(KERN_INFO "%s: cold reset timeout (GSR=%#lx)\n",
+ __func__, gsr);
+
+ return false;
+ }
+
+ return true;
+}
+EXPORT_SYMBOL_GPL(pxa2xx_ac97_try_cold_reset);
+
+
+void pxa2xx_ac97_finish_reset(void)
+{
+ u32 gcr = readl(ac97_reg_base + GCR);
+ gcr &= ~(GCR_PRIRDY_IEN|GCR_SECRDY_IEN);
+ gcr |= GCR_SDONE_IE|GCR_CDONE_IE;
+ writel(gcr, ac97_reg_base + GCR);
+}
+EXPORT_SYMBOL_GPL(pxa2xx_ac97_finish_reset);
+
+static irqreturn_t pxa2xx_ac97_irq(int irq, void *dev_id)
+{
+ long status;
+
+ status = readl(ac97_reg_base + GSR);
+ if (status) {
+ writel(status, ac97_reg_base + GSR);
+ gsr_bits |= status;
+ wake_up(&gsr_wq);
+
+ /* Although we don't use those we still need to clear them
+ since they tend to spuriously trigger when MMC is used
+ (hardware bug? go figure)... */
+ if (cpu_is_pxa27x()) {
+ writel(MISR_EOC, ac97_reg_base + MISR);
+ writel(PISR_EOC, ac97_reg_base + PISR);
+ writel(MCSR_EOC, ac97_reg_base + MCSR);
+ }
+
+ return IRQ_HANDLED;
+ }
+
+ return IRQ_NONE;
+}
+
+#ifdef CONFIG_PM
+int pxa2xx_ac97_hw_suspend(void)
+{
+ writel(readl(ac97_reg_base + GCR) | (GCR_ACLINK_OFF), ac97_reg_base + GCR);
+ clk_disable_unprepare(ac97_clk);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(pxa2xx_ac97_hw_suspend);
+
+int pxa2xx_ac97_hw_resume(void)
+{
+ clk_prepare_enable(ac97_clk);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(pxa2xx_ac97_hw_resume);
+#endif
+
+int pxa2xx_ac97_hw_probe(struct platform_device *dev)
+{
+ int ret;
+ int irq;
+ pxa2xx_audio_ops_t *pdata = dev->dev.platform_data;
+
+ ac97_reg_base = devm_platform_ioremap_resource(dev, 0);
+ if (IS_ERR(ac97_reg_base)) {
+ dev_err(&dev->dev, "Missing MMIO resource\n");
+ return PTR_ERR(ac97_reg_base);
+ }
+
+ if (pdata) {
+ switch (pdata->reset_gpio) {
+ case 95:
+ case 113:
+ reset_gpio = pdata->reset_gpio;
+ break;
+ case 0:
+ reset_gpio = 113;
+ break;
+ case -1:
+ break;
+ default:
+ dev_err(&dev->dev, "Invalid reset GPIO %d\n",
+ pdata->reset_gpio);
+ }
+ } else if (!pdata && dev->dev.of_node) {
+ pdata = devm_kzalloc(&dev->dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata)
+ return -ENOMEM;
+ pdata->reset_gpio = of_get_named_gpio(dev->dev.of_node,
+ "reset-gpios", 0);
+ if (pdata->reset_gpio == -ENOENT)
+ pdata->reset_gpio = -1;
+ else if (pdata->reset_gpio < 0)
+ return pdata->reset_gpio;
+ reset_gpio = pdata->reset_gpio;
+ } else {
+ if (cpu_is_pxa27x())
+ reset_gpio = 113;
+ }
+
+ if (cpu_is_pxa27x()) {
+ /*
+ * This gpio is needed for a work-around to a bug in the ac97
+ * controller during warm reset. The direction and level is set
+ * here so that it is an output driven high when switching from
+ * AC97_nRESET alt function to generic gpio.
+ */
+ ret = gpio_request_one(reset_gpio, GPIOF_OUT_INIT_HIGH,
+ "pxa27x ac97 reset");
+ if (ret < 0) {
+ pr_err("%s: gpio_request_one() failed: %d\n",
+ __func__, ret);
+ goto err_conf;
+ }
+ pxa27x_configure_ac97reset(reset_gpio, false);
+
+ ac97conf_clk = clk_get(&dev->dev, "AC97CONFCLK");
+ if (IS_ERR(ac97conf_clk)) {
+ ret = PTR_ERR(ac97conf_clk);
+ ac97conf_clk = NULL;
+ goto err_conf;
+ }
+ }
+
+ ac97_clk = clk_get(&dev->dev, "AC97CLK");
+ if (IS_ERR(ac97_clk)) {
+ ret = PTR_ERR(ac97_clk);
+ ac97_clk = NULL;
+ goto err_clk;
+ }
+
+ ret = clk_prepare_enable(ac97_clk);
+ if (ret)
+ goto err_clk2;
+
+ irq = platform_get_irq(dev, 0);
+ if (irq < 0) {
+ ret = irq;
+ goto err_irq;
+ }
+
+ ret = request_irq(irq, pxa2xx_ac97_irq, 0, "AC97", NULL);
+ if (ret < 0)
+ goto err_irq;
+
+ return 0;
+
+err_irq:
+ writel(readl(ac97_reg_base + GCR) | (GCR_ACLINK_OFF), ac97_reg_base + GCR);
+err_clk2:
+ clk_put(ac97_clk);
+ ac97_clk = NULL;
+err_clk:
+ if (ac97conf_clk) {
+ clk_put(ac97conf_clk);
+ ac97conf_clk = NULL;
+ }
+err_conf:
+ return ret;
+}
+EXPORT_SYMBOL_GPL(pxa2xx_ac97_hw_probe);
+
+void pxa2xx_ac97_hw_remove(struct platform_device *dev)
+{
+ if (cpu_is_pxa27x())
+ gpio_free(reset_gpio);
+ writel(readl(ac97_reg_base + GCR) | (GCR_ACLINK_OFF), ac97_reg_base + GCR);
+ free_irq(platform_get_irq(dev, 0), NULL);
+ if (ac97conf_clk) {
+ clk_put(ac97conf_clk);
+ ac97conf_clk = NULL;
+ }
+ clk_disable_unprepare(ac97_clk);
+ clk_put(ac97_clk);
+ ac97_clk = NULL;
+}
+EXPORT_SYMBOL_GPL(pxa2xx_ac97_hw_remove);
+
+u32 pxa2xx_ac97_read_modr(void)
+{
+ if (!ac97_reg_base)
+ return 0;
+
+ return readl(ac97_reg_base + MODR);
+}
+EXPORT_SYMBOL_GPL(pxa2xx_ac97_read_modr);
+
+u32 pxa2xx_ac97_read_misr(void)
+{
+ if (!ac97_reg_base)
+ return 0;
+
+ return readl(ac97_reg_base + MISR);
+}
+EXPORT_SYMBOL_GPL(pxa2xx_ac97_read_misr);
+
+MODULE_AUTHOR("Nicolas Pitre");
+MODULE_DESCRIPTION("Intel/Marvell PXA sound library");
+MODULE_LICENSE("GPL");
+
diff --git a/sound/arm/pxa2xx-ac97-regs.h b/sound/arm/pxa2xx-ac97-regs.h
new file mode 100644
index 000000000..ae638a1b9
--- /dev/null
+++ b/sound/arm/pxa2xx-ac97-regs.h
@@ -0,0 +1,100 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __ASM_ARCH_REGS_AC97_H
+#define __ASM_ARCH_REGS_AC97_H
+
+/*
+ * AC97 Controller registers
+ */
+
+#define POCR (0x0000) /* PCM Out Control Register */
+#define POCR_FEIE (1 << 3) /* FIFO Error Interrupt Enable */
+#define POCR_FSRIE (1 << 1) /* FIFO Service Request Interrupt Enable */
+
+#define PICR (0x0004) /* PCM In Control Register */
+#define PICR_FEIE (1 << 3) /* FIFO Error Interrupt Enable */
+#define PICR_FSRIE (1 << 1) /* FIFO Service Request Interrupt Enable */
+
+#define MCCR (0x0008) /* Mic In Control Register */
+#define MCCR_FEIE (1 << 3) /* FIFO Error Interrupt Enable */
+#define MCCR_FSRIE (1 << 1) /* FIFO Service Request Interrupt Enable */
+
+#define GCR (0x000C) /* Global Control Register */
+#ifdef CONFIG_PXA3xx
+#define GCR_CLKBPB (1 << 31) /* Internal clock enable */
+#endif
+#define GCR_nDMAEN (1 << 24) /* non DMA Enable */
+#define GCR_CDONE_IE (1 << 19) /* Command Done Interrupt Enable */
+#define GCR_SDONE_IE (1 << 18) /* Status Done Interrupt Enable */
+#define GCR_SECRDY_IEN (1 << 9) /* Secondary Ready Interrupt Enable */
+#define GCR_PRIRDY_IEN (1 << 8) /* Primary Ready Interrupt Enable */
+#define GCR_SECRES_IEN (1 << 5) /* Secondary Resume Interrupt Enable */
+#define GCR_PRIRES_IEN (1 << 4) /* Primary Resume Interrupt Enable */
+#define GCR_ACLINK_OFF (1 << 3) /* AC-link Shut Off */
+#define GCR_WARM_RST (1 << 2) /* AC97 Warm Reset */
+#define GCR_COLD_RST (1 << 1) /* AC'97 Cold Reset (0 = active) */
+#define GCR_GIE (1 << 0) /* Codec GPI Interrupt Enable */
+
+#define POSR (0x0010) /* PCM Out Status Register */
+#define POSR_FIFOE (1 << 4) /* FIFO error */
+#define POSR_FSR (1 << 2) /* FIFO Service Request */
+
+#define PISR (0x0014) /* PCM In Status Register */
+#define PISR_FIFOE (1 << 4) /* FIFO error */
+#define PISR_EOC (1 << 3) /* DMA End-of-Chain (exclusive clear) */
+#define PISR_FSR (1 << 2) /* FIFO Service Request */
+
+#define MCSR (0x0018) /* Mic In Status Register */
+#define MCSR_FIFOE (1 << 4) /* FIFO error */
+#define MCSR_EOC (1 << 3) /* DMA End-of-Chain (exclusive clear) */
+#define MCSR_FSR (1 << 2) /* FIFO Service Request */
+
+#define GSR (0x001C) /* Global Status Register */
+#define GSR_CDONE (1 << 19) /* Command Done */
+#define GSR_SDONE (1 << 18) /* Status Done */
+#define GSR_RDCS (1 << 15) /* Read Completion Status */
+#define GSR_BIT3SLT12 (1 << 14) /* Bit 3 of slot 12 */
+#define GSR_BIT2SLT12 (1 << 13) /* Bit 2 of slot 12 */
+#define GSR_BIT1SLT12 (1 << 12) /* Bit 1 of slot 12 */
+#define GSR_SECRES (1 << 11) /* Secondary Resume Interrupt */
+#define GSR_PRIRES (1 << 10) /* Primary Resume Interrupt */
+#define GSR_SCR (1 << 9) /* Secondary Codec Ready */
+#define GSR_PCR (1 << 8) /* Primary Codec Ready */
+#define GSR_MCINT (1 << 7) /* Mic In Interrupt */
+#define GSR_POINT (1 << 6) /* PCM Out Interrupt */
+#define GSR_PIINT (1 << 5) /* PCM In Interrupt */
+#define GSR_ACOFFD (1 << 3) /* AC-link Shut Off Done */
+#define GSR_MOINT (1 << 2) /* Modem Out Interrupt */
+#define GSR_MIINT (1 << 1) /* Modem In Interrupt */
+#define GSR_GSCI (1 << 0) /* Codec GPI Status Change Interrupt */
+
+#define CAR (0x0020) /* CODEC Access Register */
+#define CAR_CAIP (1 << 0) /* Codec Access In Progress */
+
+#define PCDR (0x0040) /* PCM FIFO Data Register */
+#define MCDR (0x0060) /* Mic-in FIFO Data Register */
+
+#define MOCR (0x0100) /* Modem Out Control Register */
+#define MOCR_FEIE (1 << 3) /* FIFO Error */
+#define MOCR_FSRIE (1 << 1) /* FIFO Service Request Interrupt Enable */
+
+#define MICR (0x0108) /* Modem In Control Register */
+#define MICR_FEIE (1 << 3) /* FIFO Error */
+#define MICR_FSRIE (1 << 1) /* FIFO Service Request Interrupt Enable */
+
+#define MOSR (0x0110) /* Modem Out Status Register */
+#define MOSR_FIFOE (1 << 4) /* FIFO error */
+#define MOSR_FSR (1 << 2) /* FIFO Service Request */
+
+#define MISR (0x0118) /* Modem In Status Register */
+#define MISR_FIFOE (1 << 4) /* FIFO error */
+#define MISR_EOC (1 << 3) /* DMA End-of-Chain (exclusive clear) */
+#define MISR_FSR (1 << 2) /* FIFO Service Request */
+
+#define MODR (0x0140) /* Modem FIFO Data Register */
+
+#define PAC_REG_BASE (0x0200) /* Primary Audio Codec */
+#define SAC_REG_BASE (0x0300) /* Secondary Audio Codec */
+#define PMC_REG_BASE (0x0400) /* Primary Modem Codec */
+#define SMC_REG_BASE (0x0500) /* Secondary Modem Codec */
+
+#endif /* __ASM_ARCH_REGS_AC97_H */
diff --git a/sound/arm/pxa2xx-ac97.c b/sound/arm/pxa2xx-ac97.c
new file mode 100644
index 000000000..c16208645
--- /dev/null
+++ b/sound/arm/pxa2xx-ac97.c
@@ -0,0 +1,293 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * linux/sound/pxa2xx-ac97.c -- AC97 support for the Intel PXA2xx chip.
+ *
+ * Author: Nicolas Pitre
+ * Created: Dec 02, 2004
+ * Copyright: MontaVista Software Inc.
+ */
+
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/dmaengine.h>
+#include <linux/dma-mapping.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/ac97_codec.h>
+#include <sound/initval.h>
+#include <sound/pxa2xx-lib.h>
+#include <sound/dmaengine_pcm.h>
+
+#include <linux/platform_data/asoc-pxa.h>
+
+static void pxa2xx_ac97_legacy_reset(struct snd_ac97 *ac97)
+{
+ if (!pxa2xx_ac97_try_cold_reset())
+ pxa2xx_ac97_try_warm_reset();
+
+ pxa2xx_ac97_finish_reset();
+}
+
+static unsigned short pxa2xx_ac97_legacy_read(struct snd_ac97 *ac97,
+ unsigned short reg)
+{
+ int ret;
+
+ ret = pxa2xx_ac97_read(ac97->num, reg);
+ if (ret < 0)
+ return 0;
+ else
+ return (unsigned short)(ret & 0xffff);
+}
+
+static void pxa2xx_ac97_legacy_write(struct snd_ac97 *ac97,
+ unsigned short reg, unsigned short val)
+{
+ pxa2xx_ac97_write(ac97->num, reg, val);
+}
+
+static const struct snd_ac97_bus_ops pxa2xx_ac97_ops = {
+ .read = pxa2xx_ac97_legacy_read,
+ .write = pxa2xx_ac97_legacy_write,
+ .reset = pxa2xx_ac97_legacy_reset,
+};
+
+static struct snd_pcm *pxa2xx_ac97_pcm;
+static struct snd_ac97 *pxa2xx_ac97_ac97;
+
+static int pxa2xx_ac97_pcm_open(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ pxa2xx_audio_ops_t *platform_ops;
+ int ret, i;
+
+ ret = pxa2xx_pcm_open(substream);
+ if (ret)
+ return ret;
+
+ runtime->hw.channels_min = 2;
+ runtime->hw.channels_max = 2;
+
+ i = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
+ AC97_RATES_FRONT_DAC : AC97_RATES_ADC;
+ runtime->hw.rates = pxa2xx_ac97_ac97->rates[i];
+ snd_pcm_limit_hw_rates(runtime);
+
+ platform_ops = substream->pcm->card->dev->platform_data;
+ if (platform_ops && platform_ops->startup) {
+ ret = platform_ops->startup(substream, platform_ops->priv);
+ if (ret < 0)
+ pxa2xx_pcm_close(substream);
+ }
+
+ return ret;
+}
+
+static int pxa2xx_ac97_pcm_close(struct snd_pcm_substream *substream)
+{
+ pxa2xx_audio_ops_t *platform_ops;
+
+ platform_ops = substream->pcm->card->dev->platform_data;
+ if (platform_ops && platform_ops->shutdown)
+ platform_ops->shutdown(substream, platform_ops->priv);
+
+ return 0;
+}
+
+static int pxa2xx_ac97_pcm_prepare(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
+ AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE;
+ int ret;
+
+ ret = pxa2xx_pcm_prepare(substream);
+ if (ret < 0)
+ return ret;
+
+ return snd_ac97_set_rate(pxa2xx_ac97_ac97, reg, runtime->rate);
+}
+
+#ifdef CONFIG_PM_SLEEP
+
+static int pxa2xx_ac97_do_suspend(struct snd_card *card)
+{
+ pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;
+
+ snd_power_change_state(card, SNDRV_CTL_POWER_D3cold);
+ snd_ac97_suspend(pxa2xx_ac97_ac97);
+ if (platform_ops && platform_ops->suspend)
+ platform_ops->suspend(platform_ops->priv);
+
+ return pxa2xx_ac97_hw_suspend();
+}
+
+static int pxa2xx_ac97_do_resume(struct snd_card *card)
+{
+ pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;
+ int rc;
+
+ rc = pxa2xx_ac97_hw_resume();
+ if (rc)
+ return rc;
+
+ if (platform_ops && platform_ops->resume)
+ platform_ops->resume(platform_ops->priv);
+ snd_ac97_resume(pxa2xx_ac97_ac97);
+ snd_power_change_state(card, SNDRV_CTL_POWER_D0);
+
+ return 0;
+}
+
+static int pxa2xx_ac97_suspend(struct device *dev)
+{
+ struct snd_card *card = dev_get_drvdata(dev);
+ int ret = 0;
+
+ if (card)
+ ret = pxa2xx_ac97_do_suspend(card);
+
+ return ret;
+}
+
+static int pxa2xx_ac97_resume(struct device *dev)
+{
+ struct snd_card *card = dev_get_drvdata(dev);
+ int ret = 0;
+
+ if (card)
+ ret = pxa2xx_ac97_do_resume(card);
+
+ return ret;
+}
+
+static SIMPLE_DEV_PM_OPS(pxa2xx_ac97_pm_ops, pxa2xx_ac97_suspend, pxa2xx_ac97_resume);
+#endif
+
+static const struct snd_pcm_ops pxa2xx_ac97_pcm_ops = {
+ .open = pxa2xx_ac97_pcm_open,
+ .close = pxa2xx_ac97_pcm_close,
+ .hw_params = pxa2xx_pcm_hw_params,
+ .prepare = pxa2xx_ac97_pcm_prepare,
+ .trigger = pxa2xx_pcm_trigger,
+ .pointer = pxa2xx_pcm_pointer,
+};
+
+
+static int pxa2xx_ac97_pcm_new(struct snd_card *card)
+{
+ struct snd_pcm *pcm;
+ int ret;
+
+ ret = snd_pcm_new(card, "PXA2xx-PCM", 0, 1, 1, &pcm);
+ if (ret)
+ goto out;
+
+ ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
+ if (ret)
+ goto out;
+
+ snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &pxa2xx_ac97_pcm_ops);
+ snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &pxa2xx_ac97_pcm_ops);
+ ret = pxa2xx_pcm_preallocate_dma_buffer(pcm);
+ if (ret)
+ goto out;
+
+ pxa2xx_ac97_pcm = pcm;
+ ret = 0;
+
+ out:
+ return ret;
+}
+
+static int pxa2xx_ac97_probe(struct platform_device *dev)
+{
+ struct snd_card *card;
+ struct snd_ac97_bus *ac97_bus;
+ struct snd_ac97_template ac97_template;
+ int ret;
+ pxa2xx_audio_ops_t *pdata = dev->dev.platform_data;
+
+ if (dev->id >= 0) {
+ dev_err(&dev->dev, "PXA2xx has only one AC97 port.\n");
+ ret = -ENXIO;
+ goto err_dev;
+ }
+
+ ret = snd_card_new(&dev->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
+ THIS_MODULE, 0, &card);
+ if (ret < 0)
+ goto err;
+
+ strscpy(card->driver, dev->dev.driver->name, sizeof(card->driver));
+
+ ret = pxa2xx_ac97_pcm_new(card);
+ if (ret)
+ goto err;
+
+ ret = pxa2xx_ac97_hw_probe(dev);
+ if (ret)
+ goto err;
+
+ ret = snd_ac97_bus(card, 0, &pxa2xx_ac97_ops, NULL, &ac97_bus);
+ if (ret)
+ goto err_remove;
+ memset(&ac97_template, 0, sizeof(ac97_template));
+ ret = snd_ac97_mixer(ac97_bus, &ac97_template, &pxa2xx_ac97_ac97);
+ if (ret)
+ goto err_remove;
+
+ snprintf(card->shortname, sizeof(card->shortname),
+ "%s", snd_ac97_get_short_name(pxa2xx_ac97_ac97));
+ snprintf(card->longname, sizeof(card->longname),
+ "%s (%s)", dev->dev.driver->name, card->mixername);
+
+ if (pdata && pdata->codec_pdata[0])
+ snd_ac97_dev_add_pdata(ac97_bus->codec[0], pdata->codec_pdata[0]);
+ ret = snd_card_register(card);
+ if (ret == 0) {
+ platform_set_drvdata(dev, card);
+ return 0;
+ }
+
+err_remove:
+ pxa2xx_ac97_hw_remove(dev);
+err:
+ if (card)
+ snd_card_free(card);
+err_dev:
+ return ret;
+}
+
+static int pxa2xx_ac97_remove(struct platform_device *dev)
+{
+ struct snd_card *card = platform_get_drvdata(dev);
+
+ if (card) {
+ snd_card_free(card);
+ pxa2xx_ac97_hw_remove(dev);
+ }
+
+ return 0;
+}
+
+static struct platform_driver pxa2xx_ac97_driver = {
+ .probe = pxa2xx_ac97_probe,
+ .remove = pxa2xx_ac97_remove,
+ .driver = {
+ .name = "pxa2xx-ac97",
+#ifdef CONFIG_PM_SLEEP
+ .pm = &pxa2xx_ac97_pm_ops,
+#endif
+ },
+};
+
+module_platform_driver(pxa2xx_ac97_driver);
+
+MODULE_AUTHOR("Nicolas Pitre");
+MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:pxa2xx-ac97");
diff --git a/sound/arm/pxa2xx-pcm-lib.c b/sound/arm/pxa2xx-pcm-lib.c
new file mode 100644
index 000000000..0a48805e5
--- /dev/null
+++ b/sound/arm/pxa2xx-pcm-lib.c
@@ -0,0 +1,195 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/dma-mapping.h>
+#include <linux/dmaengine.h>
+#include <linux/dma/pxa-dma.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/pxa2xx-lib.h>
+#include <sound/dmaengine_pcm.h>
+
+static const struct snd_pcm_hardware pxa2xx_pcm_hardware = {
+ .info = SNDRV_PCM_INFO_MMAP |
+ SNDRV_PCM_INFO_MMAP_VALID |
+ SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_PAUSE |
+ SNDRV_PCM_INFO_RESUME,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE |
+ SNDRV_PCM_FMTBIT_S24_LE |
+ SNDRV_PCM_FMTBIT_S32_LE,
+ .period_bytes_min = 32,
+ .period_bytes_max = 8192 - 32,
+ .periods_min = 1,
+ .periods_max = 256,
+ .buffer_bytes_max = 128 * 1024,
+ .fifo_size = 32,
+};
+
+int pxa2xx_pcm_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params)
+{
+ struct dma_chan *chan = snd_dmaengine_pcm_get_chan(substream);
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_dmaengine_dai_dma_data *dma_params;
+ struct dma_slave_config config;
+ int ret;
+
+ dma_params = snd_soc_dai_get_dma_data(asoc_rtd_to_cpu(rtd, 0), substream);
+ if (!dma_params)
+ return 0;
+
+ ret = snd_hwparams_to_dma_slave_config(substream, params, &config);
+ if (ret)
+ return ret;
+
+ snd_dmaengine_pcm_set_config_from_dai_data(substream,
+ snd_soc_dai_get_dma_data(asoc_rtd_to_cpu(rtd, 0), substream),
+ &config);
+
+ ret = dmaengine_slave_config(chan, &config);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+EXPORT_SYMBOL(pxa2xx_pcm_hw_params);
+
+int pxa2xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
+{
+ return snd_dmaengine_pcm_trigger(substream, cmd);
+}
+EXPORT_SYMBOL(pxa2xx_pcm_trigger);
+
+snd_pcm_uframes_t
+pxa2xx_pcm_pointer(struct snd_pcm_substream *substream)
+{
+ return snd_dmaengine_pcm_pointer(substream);
+}
+EXPORT_SYMBOL(pxa2xx_pcm_pointer);
+
+int pxa2xx_pcm_prepare(struct snd_pcm_substream *substream)
+{
+ return 0;
+}
+EXPORT_SYMBOL(pxa2xx_pcm_prepare);
+
+int pxa2xx_pcm_open(struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct snd_dmaengine_dai_dma_data *dma_params;
+ int ret;
+
+ runtime->hw = pxa2xx_pcm_hardware;
+
+ dma_params = snd_soc_dai_get_dma_data(asoc_rtd_to_cpu(rtd, 0), substream);
+ if (!dma_params)
+ return 0;
+
+ /*
+ * For mysterious reasons (and despite what the manual says)
+ * playback samples are lost if the DMA count is not a multiple
+ * of the DMA burst size. Let's add a rule to enforce that.
+ */
+ ret = snd_pcm_hw_constraint_step(runtime, 0,
+ SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 32);
+ if (ret)
+ return ret;
+
+ ret = snd_pcm_hw_constraint_step(runtime, 0,
+ SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 32);
+ if (ret)
+ return ret;
+
+ ret = snd_pcm_hw_constraint_integer(runtime,
+ SNDRV_PCM_HW_PARAM_PERIODS);
+ if (ret < 0)
+ return ret;
+
+ return snd_dmaengine_pcm_open(
+ substream, dma_request_slave_channel(asoc_rtd_to_cpu(rtd, 0)->dev,
+ dma_params->chan_name));
+}
+EXPORT_SYMBOL(pxa2xx_pcm_open);
+
+int pxa2xx_pcm_close(struct snd_pcm_substream *substream)
+{
+ return snd_dmaengine_pcm_close_release_chan(substream);
+}
+EXPORT_SYMBOL(pxa2xx_pcm_close);
+
+int pxa2xx_pcm_preallocate_dma_buffer(struct snd_pcm *pcm)
+{
+ size_t size = pxa2xx_pcm_hardware.buffer_bytes_max;
+
+ return snd_pcm_set_fixed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV_WC,
+ pcm->card->dev, size);
+}
+EXPORT_SYMBOL(pxa2xx_pcm_preallocate_dma_buffer);
+
+int pxa2xx_soc_pcm_new(struct snd_soc_component *component,
+ struct snd_soc_pcm_runtime *rtd)
+{
+ struct snd_card *card = rtd->card->snd_card;
+ struct snd_pcm *pcm = rtd->pcm;
+ int ret;
+
+ ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
+ if (ret)
+ return ret;
+
+ return pxa2xx_pcm_preallocate_dma_buffer(pcm);
+}
+EXPORT_SYMBOL(pxa2xx_soc_pcm_new);
+
+int pxa2xx_soc_pcm_open(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream)
+{
+ return pxa2xx_pcm_open(substream);
+}
+EXPORT_SYMBOL(pxa2xx_soc_pcm_open);
+
+int pxa2xx_soc_pcm_close(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream)
+{
+ return pxa2xx_pcm_close(substream);
+}
+EXPORT_SYMBOL(pxa2xx_soc_pcm_close);
+
+int pxa2xx_soc_pcm_hw_params(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params)
+{
+ return pxa2xx_pcm_hw_params(substream, params);
+}
+EXPORT_SYMBOL(pxa2xx_soc_pcm_hw_params);
+
+int pxa2xx_soc_pcm_prepare(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream)
+{
+ return pxa2xx_pcm_prepare(substream);
+}
+EXPORT_SYMBOL(pxa2xx_soc_pcm_prepare);
+
+int pxa2xx_soc_pcm_trigger(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream, int cmd)
+{
+ return pxa2xx_pcm_trigger(substream, cmd);
+}
+EXPORT_SYMBOL(pxa2xx_soc_pcm_trigger);
+
+snd_pcm_uframes_t
+pxa2xx_soc_pcm_pointer(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream)
+{
+ return pxa2xx_pcm_pointer(substream);
+}
+EXPORT_SYMBOL(pxa2xx_soc_pcm_pointer);
+
+MODULE_AUTHOR("Nicolas Pitre");
+MODULE_DESCRIPTION("Intel PXA2xx sound library");
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-26 00:59:27 +0000